Crystal Cavern(s), also known throughout the years as Alabama Caverns and McClu(n)ney Cave, is a small cavern containing crystal formations located in Clay, Alabama, USA.
The Natural Bridge Caverns are the largest known commercial caverns in the U.S. state of Texas. The name is derived from the 60 ft natural limestone slab bridge that spans the amphitheater setting of the cavern's entrance. The span was left suspended when a sinkhole collapsed below it.
A speleothem is a geological formation by mineral deposits that accumulate over time in natural caves. Speleothems most commonly form in calcareous caves due to carbonate dissolution reactions. They can take a variety of forms, depending on their depositional history and environment. Their chemical composition, gradual growth, and preservation in caves make them useful paleoclimatic proxies.
Luray Caverns, originally called Luray Cave, is a cave just west of Luray, Virginia, United States, which has drawn many visitors since its discovery in 1878. The cavern system is generously adorned with speleothems such as columns, mud flows, stalactites, stalagmites, flowstone, and mirrored pools. The caverns are perhaps best known for the Great Stalacpipe Organ, a lithophone made from solenoid-fired strikers that tap stalactites of various sizes to produce tones similar to those of xylophones, tuning forks, or bells.
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.
Ruby Falls is a series of underground cascading waterfalls totaling 145 feet (44 m) in Lookout Mountain, near Chattanooga, Tennessee, in the United States.
A show cave—also called tourist cave, public cave, and, in the United States, commercial cave—is a cave which has been made accessible to the public for guided visits.
Devil's Hole was a large water-filled sinkhole, close to the southeastern corner of Harrington Sound, Bermuda. At one time an littoral cave, it is fed by the Atlantic ocean proper, rather than the far closer sound, via an underground estuary. It closed in 2009.
Cumberland Caverns is a national natural landmark and show cave located in McMinnville, Tennessee. It is the second longest cave in Tennessee and makes the list of longest caves in the United States and in the world.
[[File:Black Chasm Landmark Room.jpg|thumb|300 RC), and currently Gold Country Adventures. Black Chasm was selected for consideration as a National Natural Landmark (NNL) in 1975 after National Park Service personnel entered into the cave and saw the helictite crystal display in the Landmark Room. The park service personnel described Black Chasm as having, "The best helictites in the west.". At the time, Black Chasm was slated to be quarried, as an open pit mine, for the gravel that the bedrock would provide. The quarry company who owned the land was aware of the cave, but not of its rare display of helictites. After the NNL status was granted in January 1976, the quarry company still had legal rights to quarry the property, but there was a moral obligation placed on the landowners to preserve the cave in order to retain its NNL status.<ref name="nps2">{{cite web|url=http://www.nature.nps.gov/nnl/faq.cfm#
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.
Poole's Cavern or Poole's Hole is a two-million-year-old natural limestone cave on the edge of Buxton in the Peak District, in the county of Derbyshire, England.
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.
Grand Caverns, formerly known as Weyer's Cave, is located in the central Shenandoah Valley in the town of Grottoes, Virginia, United States. A limestone cavern, it claims the distinction of being America's oldest show cave, in operation since 1806.
Talking Rocks Cavern is a cavern system located in Stone County, just west of Reeds Spring, in Branson West, in the U.S. state of Missouri. It is privately owned by Herschend Family Entertainment, and operated by Adventure Creations Inc., as a public entertainment/educational attraction.
Lost World Caverns, located just outside Lewisburg, West Virginia, is an underground natural series of caverns. In November 1973, the caverns were registered as a National Natural Landmark as they "feature terraced pedestal-like stalagmites, flowstone, curtains, rimstone, domepits, and waterfalls."
The Parque Nacional de las Cavernas del Río Camuy is a cave system in Puerto Rico. It is located between the municipalities of Camuy, Hatillo, and Lares in northwestern Puerto Rico, but the main entrance to the park is located in Quebrada, Camuy. The caverns are part of a large network of natural limestone caves and underground waterways carved out by the third-largest underground river in the world, the Río Camuy. The cave system was "discovered" in 1958 and was first documented in the 1973 book Discovery at the Río Camuy (ISBN 0-517-50594-0) by Russell and Jeanne Gurnee, but there is archaeological evidence that these caves were explored hundreds of years ago by the Taíno Indians, Puerto Rico's first inhabitants. Over 10 miles of caverns, 220 caves and 17 entrances to the Camuy cave system have been mapped so far. This, however, is only a fraction of the entire system which many experts believe still holds another 800 caves. Only a small part of the complex is open to the public. The 268-acre park built around the cave system features tours of some of the caves and sinkholes, and is one of the most popular natural attractions in Puerto Rico. After restorations necessitated by Hurricane Maria, a destructive storm that struck Puerto Rico in 2017, the park re-opened on March 24, 2021. It then closed again due to Hurricane Fiona in September, 2022.
Devil's Sinkhole State Natural Area is a natural bat habitat near the city of Rocksprings in Edwards County in the U.S. state of Texas. Carved by water erosion, the cavern is home to several million Mexican free-tailed bats that emerge at sunset during April through October.
Cascade Caverns is a historically, geologically, and biologically important limestone solutional cave 3 mi (4.8 km) south of Boerne, Texas, United States, on 226 Cascade Caverns Road, in Kendall County. It has been commercially operated as a show cave and open for public tours since 1932. Informal tours were run as far back as 1875, when Dr. Benjamin Hester owned the cave property. The cave was known by the native Lipan Apache people who lived in the area prior to 1800.
