List of World Heritage Sites in the United States

Last updated
Locations of World Heritage Sites in Hawaii
Locations of World Heritage Sites in Alaska
Locations of World Heritage Sites in Puerto Rico

The United Nations Educational, Scientific and Cultural Organization (UNESCO) World Heritage Sites are places of importance to cultural or natural heritage as described in the UNESCO World Heritage Convention, established in 1972. [1] The United States of America ratified the convention on December 7, 1973, [2] making its historical sites eligible for inclusion on the list. [3]

UNESCO Specialised agency of the United Nations

The United Nations Educational, Scientific and Cultural Organization is a specialized agency of the United Nations (UN) based in Paris, France. Its declared purpose is to contribute to promoting international collaboration in education, sciences, and culture in order to increase universal respect for justice, the rule of law, and human rights along with fundamental freedom proclaimed in the United Nations Charter. It is the successor of the League of Nations' International Committee on Intellectual Cooperation.

World Heritage Site place listed by the UNESCO as of special cultural or natural significance

A World Heritage Site is a landmark or area which is chosen by the United Nations Educational, Scientific and Cultural Organisation (UNESCO) as having cultural, historical, scientific or other form of significance, and is legally protected by international treaties. The sites are judged important to the collective interests of humanity.

Cultural heritage physical artifact or intangible attribute of a society inherited from past generations

Cultural heritage is the legacy of physical artifacts and intangible attributes of a group or society that is inherited from past generations. Not all legacies of past generations are "heritage", rather heritage is a product of selection by society.


The first sites in the United States added to the list were Mesa Verde National Park and Yellowstone National Park, both at the Second Session of the World Heritage Committee, held in Washington, D.C., September 5–8, 1978. [4] In total, 24 sites have been included, the most recent being a selection of eight structures exemplifying The 20th-century Architecture of Frank Lloyd Wright in 2019. [5] The twenty-four sites are located in twenty different states and two territories. Arizona, California, Hawaii, Illinois, Montana, New Mexico, New York, and Pennsylvania, each contain multiple sites (with the Frank Lloyd Wright site spread across six states), while two sites (Waterton-Glacier International Peace Park (Montana) and Kluane / Wrangell – St. Elias / Glacier Bay / Tatshenshini-Alsek) (Alaska) are transboundary sites shared with Canada.

Mesa Verde National Park U.S. national park in Colorado

Mesa Verde National Park is an American national park and UNESCO World Heritage Site located in Montezuma County, Colorado. The park protects some of the best-preserved Ancestral Puebloan archaeological sites in the United States.

Yellowstone National Park First national park in the world, located in the US states Wyoming, Montana and Idaho

Yellowstone National Park is an American national park located in Wyoming, Montana, and Idaho. It was established by the U.S. Congress and signed into law by President Ulysses S. Grant on March 1, 1872. Yellowstone was the first national park in the U.S. and is also widely held to be the first national park in the world. The park is known for its wildlife and its many geothermal features, especially Old Faithful geyser, one of its most popular features. It has many types of ecosystems, but the subalpine forest is the most abundant. It is part of the South Central Rockies forests ecoregion.

World Heritage Committee

The World Heritage Committee selects the sites to be listed as UNESCO World Heritage Sites, including the World Heritage List and the List of World Heritage in Danger, defines the use of the World Heritage Fund and allocates financial assistance upon requests from States Parties. It comprises of representatives from 21 state parties that are elected by the General Assembly of States Parties for a four-year term. These parties vote on decisions and proposals related to the World Heritage Convention and World Heritage List.

World Heritage Sites

The table lists information about each World Heritage Site:

Name: as listed by the World Heritage Committee
Location: city or location of site
State: one of the 50 U.S. states and six territories.
Period: time period of significance, such as construction for buildings; purely natural sites do not have a time period
UNESCO data: the site's reference number; the year the site was inscribed on the World Heritage List; the criteria it was listed under: criteria i through vi are cultural, while vii through x are natural; (the column sorts by year added to the list)
Description: brief description of the site
  * Transnational site
  Dagger-14-plain.png In danger
NameImageLocation State PeriodUNESCO dataDescription
Mesa Verde National Park MesaVerdeNationalParkCliffPalace.jpg Montezuma County Colorado 6th to 12th centuries27; 1978; iiiThe site contains a number of cliff dwellings constructed by the ancient Pueblo peoples between the 6th and 12th centuries at an altitude greater than 2,600 metres (8,500 ft). Some notable examples amongst the 600 dwellings include Cliff Palace, Balcony House, and Square Tower House. The dwellings were discovered in 1874. [6]
Yellowstone National Park YellowstonefallJUN05.JPG Park and Teton counties, Wyoming; Gallatin and Park counties, Montana; Fremont County, Idaho Wyoming, Montana, Idaho N/A28; 1978; vii, viii, ix, xThe park consists of almost 9,000 square kilometres (9.7×1010 sq ft) of natural forest. The park contains half of the world's geothermal features including over 300 geysers, the world's largest concentration. In addition to its geographical sites, Yellowstone is significant for its natural history; nearly 150 species of fossil plants have been discovered within the park. Set aside in 1872 it bears the distinction of being the first National Park in United States, and the world. [7]
Kluane / Wrangell–St. Elias / Glacier Bay / Tatshenshini-Alsek* GlacierBay3.jpg Valdez-Cordova Census Area, Yakutat City and Borough, Southeast Fairbanks Census Area, Hoonah–Angoon Census Area Alaska (with Yukon and B.C.)N/A72; 1979, 1992 (extended), 1994 (extended); vii, viii, ix, xThe joint United States–Canada site located along the border between the two countries comprise the world's largest non-polar ice field and some of the world's longest glaciers. The region is also the natural habitat for a number of species including grizzly bears, caribou, Dall sheep, and every species of Alaskan salmon, some in greater numbers than found anywhere else. [8]
Grand Canyon National Park Gcnp symmetry.jpg Coconino and Mohave counties Arizona N/A75; 1979; vii, viii, ix, xThe centerpiece of the park is the Grand Canyon, a gorge of the Colorado River. The Grand Canyon is 277 miles (446 km) long, up to 18 miles (29 km) wide and attains a depth of over a mile (6,000 feet or 1,800 metres). Nearly two billion years of the Earth's geological history have been exposed as the Colorado River and its tributaries cut their channels through layer after layer of rock while the Colorado Plateau was uplifted. [9]
Everglades National Park Dagger-14-plain.png Everglades.jpg Miami-Dade, Monroe, and Collier counties Florida N/A76; 1979; viii, ix, xThe park is the largest designated tropical wilderness reserve in North America. Featuring a variety of wetlands and tropical hammocks and rainforests, it has become a sanctuary for a large number of birds, reptiles, and threatened or protected species, as well as a host of invasive, introduced, and naturalized species. The property was placed on the List of World Heritage in Danger in 2010 due to degradation of the property resulting in a loss of marine habitat and decline in marine species. The property was previously listed as in danger from 1993–2007 due to sustained hurricane damage and deterioration of water flow and quality due to agricultural and urban development. [10] [11]
Independence Hall Independence Hall.jpg Philadelphia Pennsylvania 1732-53 (constructed), 1776, 1787. Steeple demolished 1781, replaced with new design 1828. Wings demolished 1812, reconstructed 1898.78; 1979; viThe building was designed by Andrew Hamilton and completed in 1753 to house the colonial assembly of the Province of Pennsylvania. It was the site of the Second Continental Congress during which the Declaration of Independence was signed in 1776. Following the American Revolution, the building held the Constitutional Convention which debated and signed the United States Constitution in 1787. Both documents have served as inspirations for lawmakers and government charters throughout the world. [13] [14]
Redwood National and State Parks Redwood National Park, fog in the forest.jpg Humboldt and Del Norte counties California N/A134; 1980; vii, ixLocated along the coast of northern California, the park is covered with coast redwood trees, the tallest and one of the most massive tree species on Earth. The park also contains areas of pristine coastline, which support nesting and feeding areas for several species of migratory waterfowl. [15]
Mammoth Cave National Park Mammoth Cave Mammoth Dome.jpg Edmonson, Hart, and Barren counties Kentucky N/A150; 1981; vii, viii, xMammoth Cave is the longest cave system known in the world. With over 390 miles (630 km) of passageways, the cave system is home to more than 130 species. [16]
Olympic National Park Olympic National Park coast.jpg Jefferson, Clallam, Mason, and Grays Harbor counties Washington N/A151; 1981; vii, ixThe park contains a diversity of ecosystems and varied topography ranging from the Pacific coastline, to alpine areas, temperate rainforests, and the forests covering the park's drier east side. [17]
Cahokia Monks Mound in July.JPG St. Clair County Illinois 7th to 15th centuries198; 1982; iii, ivThe site was the largest and most influential urban settlement in the Mississippian culture which developed advanced societies across much of what is now the Southeastern United States, beginning more than 500 years before European contact. The settlement covered nearly 1,600 hectares (4,000 acres) and included some 120 mounds. [18]
Great Smoky Mountains National Park Sugarlands-bh1.jpg Swain and Haywood counties in North Carolina; Sevier, Blount, and Cocke counties in Tennessee Tennessee, North Carolina N/A259; 1983; vii, viii, ix, xThe park is one of the world's largest remaining remnants of the diverse Arcto-Tertiary Geoflora era, containing over 3,500 plant species and numerous animal species, including one of the world's greatest variety of salamanders. [19]
La Fortaleza and San Juan National Historic Site in Puerto Rico San Felipe del Morro view across bay.jpg San Juan Puerto Rico 1 15th to 18th centuries266; 1983; viThese structures were built between the 15th and 19th centuries to defend the harbor of San Juan, and are examples of European military architecture adapted to port cities on the American continent. La Fortaleza was the first defensive fortification built for the city. The historic site also comprises Castillo San Felipe del Morro, Castillo de San Cristóbal, El Cañuelo, and three-fourths of the old city wall. [20]
Statue of Liberty Statue of Liberty 7.jpg New York City New York 1886307; 1984l i, viDesigned by Frédéric Bartholdi, the statue was a gift to the United States from the people of France. It has since become an icon of freedom and of the United States, and a welcoming signal to immigrants arriving from abroad. [21]
Yosemite National Park 1 yosemite valley tunnel view 2010.JPG Tuolumne, Mariposa and Madera counties California N/A308; 1984; vii, viiiFormed as a result of repeated glacial erosion of granitic bedrock over 10 million years, the park contains a unique diverse landscape of spectacular granite cliffs, waterfalls, clear streams, Giant Sequoia groves, and biological diversity. [22]
Chaco Culture National Historical Park Chaco Canyon Chetro Ketl great kiva plaza NPS.jpg San Juan and McKinley counties New Mexico 10th to 12th centuries353; 1987; iiiFormerly a major center of culture for the Ancestral Puebloans, the park preserves one of the United States' most important pre-Columbian cultural and historical areas, hosting the densest and most exceptional concentration of pueblos in the American Southwest. [23]
Hawaiʻi Volcanoes National Park Pahoehoe and Aa flows at Hawaii.jpg Hawaii County Hawaii N/A409; 1987; viiiThe park is home to Kīlauea and Mauna Loa, two of the most active volcanoes in the world. The volcanic eruptions in the area have resulted in frequently changing landscape, and rare flora and fauna. [24]
Monticello and the University of Virginia Monticello 2010-10-29.jpg Albemarle County and Charlottesville Virginia 18th and 19th centuries442; 1987; i, iv, viBuilt between 1769 and 1809, Monticello was the plantation home of its designer, third President of the United States and author of the Declaration of Independence, Thomas Jefferson. Jefferson designed the early buildings that made up the University of Virginia in Charlottesville, inspired by his new ideas of university planning. The most prominent of these, The Rotunda, is a half-scale model of the Pantheon in Rome. [25]
Taos Pueblo NMtrip-05-047.jpg Taos New Mexico 13th and 14th centuries492; 1992; ivThe site is an ancient pueblo belonging to a Native American tribe of Pueblo people, marking the cultural development in the region during the Pre-Columbian era. [26]
Carlsbad Caverns National Park Carlsbad Caverns rail pic.JPG Eddy County New Mexico N/A721; 1995; vii, viiiThe park contains over 100 limestone caves, including Carlsbad Caverns and Lechuguilla Cave, which exhibit rare and unique speleothems. This is one of the few sites in the world where scientists can study these ongoing geological and biological processes in its pristine environment. [27]
Waterton-Glacier International Peace Park* St Mary Lake.jpg Flathead and Glacier counties Montana (with Alberta)N/A354; 1995; vii, ixThe joint United States–Canada site located along the border between the two countries has a unique, distinctive climate, physiographic setting, mountain-prairie interface, and tri-ocean hydrographical divide. [28]
Papahānaumokuākea Heterocentrotus mammilatus.jpg Honolulu County, Hawaii and Midway Atoll 2 Hawaii and United States Minor Outlying Islands 2 N/A1326; 2010; iii, vi, viii, ix, xThe marine national monument encompasses 140,000 square miles (360,000 km2) of ocean waters, including ten islands and atolls of the Northwestern Hawaiian Islands, making it the world's largest marine protected area. The area supports 7,000 species, one quarter of which are endemic. The area is regarded with traditional significance for living Native Hawaiian culture, as an embodiment of the Hawaiian concept of kinship between people and the natural world. The monument also contains the pre-European archaeological sites on the islands of Nihoa and Makumanamana. [29]
Monumental Earthworks of Poverty Point Mound & Mound at Poverty Point.jpg West Carroll Parish Louisiana 1650 BCE1435; 2014; iiiThe vast earthen architecture of this site was constructed by a foraging society of hunter- gatherers, not a settled agricultural people, which makes it all the more remarkable a site. It is still not understood how and why such a society could so totally transform this landscape. It may well be the largest hunter-gatherer settlement that has ever existed. Its design was unique and its construction required an unprecedented amount (over 750,000 cubic meters) of earth-moving. Poverty Point was also the center of a major exchange network with goods brought in from as far as 1,600 kilometers (1,000 miles) distant. [30]
San Antonio Missions Mission Espada Chapel1.JPG San Antonio Texas 1700s, 1800s1466; 2015; iiThe site encompasses a group of five frontier mission complexes situated along a stretch of the San Antonio River basin in southern Texas, as well as a ranch located 37 kilometres to the south. It includes architectural and archaeological structures, farmlands, residencies, churches and granaries, as well as water distribution systems. The complexes were built by Franciscan missionaries in the 18th century and illustrate the Spanish Crown’s efforts to colonize, evangelize and defend the northern frontier of New Spain. The San Antonio Missions are also an example of the interweaving of Spanish and Coahuiltecan cultures, illustrated by a variety of features, including the decorative elements of churches, which combine Catholic symbols with indigenous designs inspired by nature. [31]
The 20th-Century Architecture of Frank Lloyd Wright Taliesin, the "natural house" of architect Frank Lloyd Wright and one of the nation's most famous homes, Spring Green, Wisconsin LCCN2011632365.tif Arizona
New York
1900–19501496; 2019; iiThis listing consists of eight buildings designed by architect Frank Lloyd Wright, "reflecting the 'organic architecture' developed by Wright, which includes an open plan, a blurring of the boundaries between exterior and interior and the unprecedented use of materials such as steel and concrete." Wright's work had international influence. [32] [33]

Sites by state

Exclusive sites refer to sites located in a single community. Shared sites refers to sites with entries in multiple states or shared with another country.

StateExclusive sitesShared sites
New Mexico 3
California 21
Arizona 11
Hawaii 11
Illinois 11
New York 11
Pennsylvania 11
Colorado 1
Florida 1
Kentucky 1
Louisiana 1
Puerto Rico 1 1
Texas 1
Virginia 1
Washington 1
Montana 2
Alaska 1
Idaho 1
North Carolina 1
Tennessee 1
United States Minor Outlying Islands 2 1
Wisconsin 1
Wyoming 1

Tentative list

The following sites have been added to the United States' tentative list of inclusion on the World Heritage List. The tentative list for sites within the United States was last updated in 2017. In addition to sites within the 50 states, the tentative list includes one site in American Samoa, an unincorporated territory of the United States. [34]

American Samoa US territory in the Pacific

American Samoa is an unincorporated territory of the United States located in the South Pacific Ocean, southeast of Samoa. Its location is centered on 14.2710° S, 170.1322° W. It is east of the International Date Line, while independent Samoa is west of the Line.

Under United States law, an unincorporated territory is an area controlled by the United States government that is not "incorporated" for the purposes of United States constitutional law. In unincorporated territories, the U.S. Constitution applies only partially. In the absence of an organic law, a territory is classified as unorganized. In unincorporated territories, "fundamental rights apply as a matter of law, but other constitutional rights are not available". Selected constitutional provisions apply, depending on congressional acts and judicial rulings according to U.S. constitutional practice, local tradition, and law.

  1. Big Bend National Park (12/04/2017)
  2. Brooklyn Bridge (12/04/2017)
  3. California Current Conservation Complex (Greater Farallones, Cordell Bank, and Monterey Bay National Marine Sanctuaries; marine waters and certain coastal areas of Point Reyes National Seashore and Golden Gate National Recreation Area; Farallon Islands National Wildlife Refuge; California Coastal National Monument; and a network of special marine protected areas designated by the State of California) (12/04/2017)
  4. Central Park (12/04/2017)
  5. Civil rights movement sites (Dexter Avenue King Memorial Baptist Church, Bethel Baptist Church, 16th Street Baptist Church)
  6. Dayton Aviation sites (Huffman Prairie Flying Field, Wright Cycle Company and Wright & Wright Printing, Wright Hall, Hawthorn Hill)
  7. Early Chicago Skyscrapers (Auditorium Building, Second Leiter Building, Marquette Building, Rookery Building, Monadnock Building, Old Colony Building, Fisher Building, Schlesinger & Mayer Building, and Ludington Building) (12/04/2017)
  8. Ellis Island (12/04/2017)
  9. Hopewell Ceremonial Earthworks (Fort Ancient State Memorial, Hopewell Culture National Historic Park, Newark Earthworks State Memorial)
  10. Marianas Trench Marine National Monument (12/04/2017)
  11. Marine Protected Areas of American Samoa (National Marine Sanctuary of American Samoa, Rose Atoll Marine National Monument and Wildlife Refuge) (12/04/2017)
  12. Moravian Church Settlements (in the Moravian Bethlehem district of Bethlehem, Pennsylvania) (12/04/2017)
  13. Mount Vernon
  14. Okefenokee National Wildlife Refuge
  15. Pacific Remote Islands Marine National Monument
  16. Petrified Forest National Park
  17. Serpent Mound
  18. Thomas Jefferson Buildings (Poplar Forest, Virginia State Capitol) — proposed extension of Monticello and the University of Virginia listing
  19. White Sands National Monument

See also

Tourism in the United States

Tourism in the United States is a large industry that serves millions of international and domestic tourists yearly. Foreigners visit the U.S. to see natural wonders, cities, historic landmarks, and entertainment venues. Americans seek similar attractions, as well as recreation and vacation areas.


1. ^ Puerto Rico is an unincorporated territory within the United States.
2. ^ Midway Atoll is a part of the United States Minor Outlying Islands, a statistical designation of uninhabited insular areas of the United States and is administered as a National Wildlife Refuge.

Related Research Articles

Glacier Bay National Park and Preserve national park of the United States

Glacier Bay National Park and Preserve is an American national park located in Southeast Alaska west of Juneau. President Calvin Coolidge proclaimed the area around Glacier Bay a national monument under the Antiquities Act on February 25, 1925. Subsequent to an expansion of the monument by President Jimmy Carter in 1978, the Alaska National Interest Lands Conservation Act (ANILCA) enlarged the national monument by 523,000 acres on December 2, 1980, and created Glacier Bay National Park and Preserve. The national preserve encompasses 58,406 acres of public land to the immediate northwest of the park, protecting a portion of the Alsek River with its fish and wildlife habitats, while allowing sport hunting.

Hopewell Culture National Historical Park

Hopewell Culture National Historical Park is a United States national historical park with earthworks and burial mounds from the Hopewell culture, indigenous peoples who flourished from about 200 BC to AD 500. The park is composed of six separate sites in Ross County, Ohio, including the former Mound City Group National Monument. The park includes archaeological resources of the Hopewell culture. It is administered by the United States Department of the Interior's National Park Service.

World Heritage Sites by country Wikimedia list article

As of July 2019, there are a total of 1,121 World Heritage Sites located in 167 States Parties, of which 869 are cultural, 213 are natural and 39 are mixed properties. The countries have been divided by the World Heritage Committee into five geographic zones: Africa, Arab States, Asia and the Pacific, Europe and North America, and Latin America and the Caribbean. China and Italy have the highest number of World Heritage Sites, both with 55 entries. However, 27 state parties have no properties inscribed on the World Heritage List: Bahamas, Bhutan, Brunei, Burundi, Comoros, Cook Islands, Djibouti, Equatorial Guinea, Eswatini, Grenada, Guinea-Bissau, Guyana, Kuwait, Liberia, Maldives, Monaco, Niue, Rwanda, Saint Vincent and the Grenadines, Samoa, Sao Tome and Principe, Sierra Leone, Somalia, South Sudan, Timor-Leste, Tonga and Trinidad and Tobago.

Papahānaumokuākea Marine National Monument national monument in the United States

The Papahānaumokuākea Marine National Monument is a World Heritage listed U.S. National Monument encompassing 583,000 square miles (1,510,000 km2) of ocean waters, including ten islands and atolls of the Northwestern Hawaiian Islands. Created in June 2006 with 140,000 square miles (360,000 km2), it was expanded in August 2016 by moving its border to the limit of the exclusive economic zone, making it one of the world's largest protected areas. It is internationally known for its cultural and natural values as follows:

"The area has deep cosmological and traditional significance for living Native Hawaiian culture, as an ancestral environment, as an embodiment of the Hawaiian concept of kinship between people and the natural world, and as the place where it is believed that life originates and to where the spirits return after death. On two of the islands, Nihoa and Makumanamana, there are archaeological remains relating to pre-European settlement and use. Much of the monument is made up of pelagic and deepwater habitats, with notable features such as seamounts and submerged banks, extensive coral reefs and lagoons."

The 20th-Century Architecture of Frank Lloyd Wright is a UNESCO World Heritage Site consisting of a selection of eight buildings across the United States that were designed by American architect Frank Lloyd Wright. These sites demonstrate his philosophy of organic architecture, designing structures that were in harmony with humanity and its environment. Wright's work had an international influence on the development of architecture in the 20th century.


  1. "The World Heritage Convention". UNESCO. Retrieved September 14, 2012.
  2. States Parties Ratification Status UNESCO 2014 Retrieved on 03 June 2016
  3. "United States – Properties inscribed on the World Heritage List". UNESCO. Retrieved September 14, 2012.
  4. "Report of Rapporteur" (PDF). UNESCO. Retrieved September 14, 2012.
  5. "The 20th-century Architecture of Frank Lloyd Wright". UNESCO. Retrieved July 8, 2019.
  6. "Mesa Verde National Park". UNESCO. Retrieved September 11, 2012.
  7. "Yellowstone National Park". UNESCO. Retrieved September 11, 2012.
  8. "Kluane/Wrangell-St. Elias/Glacier Bay/Tatshenshini-Alsek". UNESCO. Retrieved September 15, 2012.
  9. "Grand Canyon National Park". UNESCO. Retrieved November 25, 2012.
  10. "Everglades National Park". UNESCO. Retrieved November 25, 2012.
  11. "World Heritage Committee: Seventeenth session" (PDF). UNESCO. pp. 20–21. Retrieved 26 June 2011.
  12. 34th session 2010 , pp. 82–83
  13. "Independence Hall". UNESCO. Retrieved September 15, 2012.
  14. "Independence Hall". National Park Service. Retrieved September 15, 2012.
  15. "Redwood National and State Parks". UNESCO. Retrieved November 25, 2012.
  16. "Mammoth Cave National Park". UNESCO. Retrieved November 25, 2012.
  17. "Olympic National Park". UNESCO. Retrieved November 25, 2012.
  18. "Cahokia". UNESCO. Retrieved November 25, 2012.
  19. "Great Smoky Mountains National Park". UNESCO. Retrieved November 25, 2012.
  20. "La Fortaleza and San Juan National Historic Site". UNESCO. Retrieved November 25, 2012.
  21. "Statue of Liberty". UNESCO. Retrieved November 25, 2012.
  22. "Yosemite National Park". UNESCO. Retrieved November 25, 2012.
  23. "Chaco Culture". UNESCO. Retrieved November 25, 2012.
  24. "Hawaii Volcanoes National Park". UNESCO. Archived from the original on February 24, 2017. Retrieved November 25, 2012.
  25. "Monticello and the University of Virginia". UNESCO. Retrieved September 11, 2012.
  26. "Taos Pueblo". UNESCO. Retrieved November 25, 2012.
  27. "Taos Pueblo". UNESCO. Retrieved November 25, 2012.
  28. "Waterton-Glacier International Peace Park". UNESCO. Retrieved November 25, 2012.
  29. "Papahānaumokuākea". UNESCO. Retrieved November 25, 2012.
  30. "Monumental Earthworks of Poverty Point". UNESCO. Retrieved June 23, 2014.
  31. "San Antonio Missions". UNESCO. Retrieved July 8, 2015.
  32. "Two cultural sites added to UNESCO's World Heritage List". UNESCO World Heritage Centre. Retrieved 2019-07-08.
  33. "UNESCO Adds 8 Frank Lloyd Wright Buildings To Its List Of World Heritage Sites". Retrieved 2019-07-08.
  34. "Tentative list of United States". UNESCO. March 12, 2017. Retrieved September 11, 2012.