Mammoth Spring is a large, first magnitude karst spring that arises in the Ozark Plateau within the state of Arkansas. It is the largest spring in Arkansas and the third-largest spring within the Ozark Plateau region behind Big Spring and Greer Spring. Mammoth Spring is the seventh-largest natural spring in the world.
Sam's Point Preserve, or Sam's Point Dwarf Pine Ridge Preserve, is a 4,600-acre (19 km2) preserve in Ulster County on the highest point of the Shawangunk Ridge in New York, on the Wawarsing, New York-Shawangunk town line. It is owned and managed by the New York State Office of Parks, Recreation and Historic Preservation after having previously been managed by The Nature Conservancy. Its unique environment features dwarf pitch pine trees along the ridgetop. Located within the park is Lake Maratanza, the highest lake on the ridge, and the Ellenville Fault Ice Caves.
Cathedral Caverns State Park is a public recreation area and natural history preserve located in Kennamer Cove, Alabama, approximately 5 miles (8.0 km) northeast of Grant and 7 miles (11 km) southeast of Woodville in Marshall County. The park, first known as Bats Cave, was developed as a tourist attraction in the 1950s. Cathedral Caverns was declared a National Natural Landmark in 1972 and opened as a state park in 2000.
Pictograph Cave is an area of three caves located 5 miles (8.0 km) south of Billings, Montana, United States, preserved and protected in the 23-acre (9.3 ha) Pictograph Cave State Park.
Mississippi Palisades State Park is a National Natural Landmark located in Carroll County, Illinois, just north of the town of Savanna. It is a partially conserved section of the Mississippi Palisades. The area contains many caves and large cliffs along the Mississippi River at the mouth of the Apple River in the Driftless Area of far northwestern Illinois.
Cold Water Spring State Preserve is a 60-acre (240,000 m2) parcel state preserve protecting a spring that issues from Cold Water Cave, an extensive cave system in Winneshiek County, Iowa and Fillmore County, Minnesota. The spring is a tributary of the Upper Iowa River.
(Big) Bone Cave is a cave located in Van Buren County, Tennessee, in the community of Bone Cave that is named after it. It is notable both for its history and current recreational use. It is listed on the National Register of Historic Places and a designated National Natural Landmark. It is a 400-acre (161.9 ha) State Natural Area managed by Rock Island State Park. It is named for the discovery of the bones of a giant ground sloth in 1811. The cave was operated as a saltpeter mine, notably during the War of 1812 and the American Civil War. A variety of natural remains and human artifacts have been well preserved in the dry atmosphere of the cave. The cave is the 10th longest mapped cave in Tennessee.
Cave-In-Rock State Park is an Illinois state park, on 204 acres (0.83 km2), in the town of Cave-in-Rock, Hardin County, Illinois in the United States. The state park contains the historic Cave-In-Rock, a landmark of the Ohio River. It is maintained by the Illinois Department of Natural Resources (IDNR).
Shawnee Cave is located in Spring Mill State Park in the state of Indiana. Access to the cave is controlled by the Indiana Department of Natural Resources.
Longhorn Cavern State Park is a state park located in Burnet County, Texas, United States. The Texas Parks and Wildlife Department is administrator of the facility. The land for Longhorn Cavern State Park was acquired between 1932 and 1937 from private owners. It was dedicated as a state park in 1932 and in 1938 was opened to the public. In 1971, the cavern was dedicated as a National Natural Landmark. The park's administration building was listed as a Recorded Texas Historic Landmark in 1989.
Onondaga Cave State Park is a Missouri state park located on the Meramec River approximately 5 miles (8.0 km) southeast of the village of Leasburg. The park was established in 1982. Park activities include cave tours, camping, fishing, hiking, picnicking, and swimming.
Grand Gulf State Park is a state-operated, privately owned and publicly accessible, geologic preserve near Thayer, Missouri, United States, encompassing a forked canyon that is the remnant of an ancient collapsed dolomite cave system. The land that is now the park was acquired by conservationist Leo Drey (1917–2015) before becoming part of the Missouri state parks system. The 322-acre (130 ha) state park has been operated by the Missouri Department of Natural Resources under a lease agreement with the L-A-D Foundation since 1984. Grand Gulf was declared a National Natural Landmark in 1971 as an excellent example of karst topography and underground stream piracy. A 60-acre (24 ha) portion of the park was designated by the state as the Grand Gulf Natural Area in 1986.
The Lost River is a river that rises in Vernon Township, Washington County, Indiana, and discharges into the East Fork of the White River in Lost River Township, Martin County, Indiana. The river's unusual hydrology has led to two of its features being named as National Natural Landmarks.
Graham Cave is a Native American archeological site near Mineola, Missouri in Montgomery County in the hills above the Loutre River. It is located in the 356 acre Graham Cave State Park. The entrance of the sandstone cave forms a broad arch 120 feet (37 m) wide and 16 feet (5 m) high. Extending about 100 feet (30 m) into the hillside, the cave protects an historically important Pre-Columbian archaeological site from the ancient Dalton and Archaic period dating back to as early as 10,000 years ago.
Cedars of Lebanon State Park is a state park in Wilson County, Tennessee, in the southeastern United States. It consists of 900 acres (364 ha) situated amidst the 9,420-acre (3,810 ha) Cedars of Lebanon State Forest. The park and forest are approximately 10 miles (16 km) south of Lebanon, Tennessee.
