Montgomery County is a county in the U.S. state of Tennessee. As of the 2020 United States census, the population was 220,069. The county seat is Clarksville. The county was created in 1796. Montgomery County is included in the Clarksville, TN–KY Metropolitan Statistical Area.
Mammoth Cave National Park is an American national park in west-central Kentucky, encompassing portions of Mammoth Cave, the longest cave system known in the world.
Van Buren County is a county located in the U.S. state of Tennessee. As of the 2020 census, the population was 6,168, making it the second-least populous county in Tennessee. Its county seat is Spencer.
Marion County is a county located in the U.S. state of Tennessee. It is located in East Tennessee. As of the 2020 census, the population was 28,837. Its county seat is Jasper. Marion County is part of the Chattanooga, TN–GA Metropolitan Statistical Area. Marion County is in the Central time zone, while Chattanooga proper is in the Eastern time zone.
Grundy County is a county located in the U.S. state of Tennessee. It is located in Middle Tennessee, bordering East Tennessee. As of 2021, the population was 13,622. Its county seat is Altamont. The county is named in honor of Felix Grundy.
Fentress County is a county located in the U.S. state of Tennessee. As of the 2010 census, the population was 17,959. Its county seat is Jamestown.
Niter or nitre is the mineral form of potassium nitrate, KNO3. It is a soft, white, highly soluble mineral found primarily in arid climates or cave deposits.
Cades Cove is an isolated valley located in the Tennessee section of the Great Smoky Mountains National Park. The valley was home to numerous settlers before the formation of the national park. Today Cades Cove, the single most popular destination for visitors to the park, attracts more than two million visitors a year because of its well preserved homesteads, scenic mountain views, and abundant display of wildlife. The Cades Cove Historic District is listed on the National Register of Historic Places.
Carter Caves State Resort Park is located in Carter County, Kentucky, United States, along Tygarts Creek. It is formed by Carter Caves, and nearby Cascade Caves, which were added to the park in 1959. On December 16, 1981, 146 acres (59 ha) of the park were designated as nature preserves. Bat Cave and Cascade Caverns State Nature Preserves were dedicated for the protection of the Indiana bat, mountain maple, and Canada yew, all endangered species.
The Ozark National Scenic Riverways is a recreational unit of the National Park Service in the Ozarks of southern Missouri in the U.S.
(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.
The Wyandotte Caves is a pair of limestone caves located on the Ohio River in Harrison-Crawford State Forest in Crawford County, 5 miles (8 km) north-east of Leavenworth and 12 miles (19 km) from Corydon in southern Indiana which are a popular tourist attraction. Wyandotte Caves were designated a National Natural Landmark in 1972. They are now part of O'Bannon Woods State Park. The cave system is the 5th largest in the state of Indiana.
Lewis and Clark Caverns State Park is a 3,000-acre (1,200 ha) public recreation and nature preservation area located twelve miles (19 km) east of Whitehall in Jefferson County, Montana. The state park includes two visitor centers, ten miles of hiking trails, a campground, and its namesake limestone caverns. The Lewis and Clark Caverns Historic District was placed on the National Register of Historic Places in 2018.
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).
Carlsbad Caverns National Park is an American national park in the Guadalupe Mountains of southeastern New Mexico. The primary attraction of the park is the show cave Carlsbad Cavern. Visitors to the cave can hike in on their own via the natural entrance or take an elevator from the visitor center.
Organ Cave is a large and historic cave in Greenbrier County, West Virginia, USA. The surrounding community takes its name from the cave.
The Great Saltpetre Cave is a notable limestone cave located in Rockcastle County in southeastern Kentucky. During the War of 1812, it served as an important source of saltpeter, a vital component of gunpowder.
The Cobblestone Path is a historic pathway along the east side of the Bardstown Historic District of Bardstown, Kentucky, passing by eight acres of land. Once longer, due to various construction it now remains between Flaget Avenue and Broadway, directly across from the Bardstown Civil War Museum. Because it was always considered part of the city's street system, the Cobblestone Path is owned by the City of Bardstown, even though it now serves only pedestrian traffic.
The Confederate Nitre and Mining Bureau was a civilian government bureau to provide the Confederate States of America with needed materials such as copper, iron, lead, saltpeter, sulfur, zinc, and other metals. The Bureau oversaw civilian contracts and offered advice, instruction and guidance in the production of these materials. The Nitre and Mining Bureau was also known as the "CSNMB", the "Bureau of Nitre" or the "Nitre Bureau". The Niter and Mining Corps was the military division of the Bureau. The Nitre and Mining Bureau was part of the Confederate Ordnance Department, under the supervision of General Josiah Gorgas. The Nitre and Mining Bureau was supervised by General Isaac M. St. John. The Central Ordinance Laboratory was headed by John Mallet.
The Tumon Bay Japanese fortifications are a collection of World War II-era military structures along the coast of Guam in and near the village of Tumon. Many of these structures were listed on the National Register of Historic Places in 1991, using the alternate spelling "Tomhum". They include pillboxes on or close to the beach, and concrete structures and caves located a short way inland on the limestone cliffs that overlook the beach.
