What is the largest underground room in the United States?

Carlsbad Cavern includes a large limestone chamber, named simply the Big Room, which is almost 4,000 ft (1,220 m) long, 625 ft (191 m) wide, and 255 ft (78 m) high at its highest point. The Big Room is the largest chamber in North America and the 32nd largest in the world.



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The Wakulla System and now the combined Wakulla/Chip's System at more than 45 miles in length and 30 different entrances is the largest underwater cave system in the United States.

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Sarawak Chamber is the largest known cave chamber in the world by area and the second largest by volume after the Miao Room in China. It is in Gua Nasib Bagus (Good Luck Cave), which is located in Gunung Mulu National Park, in the Malaysian Territory of Sarawak on the island of Borneo.

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The pit is 140 feet (43 m) deep. Rangers rappel down the pit occasionally to clean trash and other debris tossed off the trail.

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Carlsbad Cavern includes a large limestone chamber, named simply the Big Room, which is almost 4,000 ft (1,220 m) long, 625 ft (191 m) wide, and 255 ft (78 m) high at its highest point. The Big Room is the largest chamber in North America and the 32nd largest in the world.

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Derinkuyu, Cappadocia, Turkey Cappadocia city, located in central Turkey, is home to no less than 36 underground cities, and at a depth of approx. 85 m, Derinkuyu is the deepest.

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The Geological History of the Jenolan Caves Scientists have determined, through the examination of the clay found in the caves, that the Jenolan subterranean system is around 340 million years old. This makes it the oldest known and dated open cave system in the world, and it is still being heavily researched today.

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#1: United States Caves (45,000) Stretching from sea to shining sea, the United States harbors an estimated 45,000+ caves, the product of millions of years of geology at work. The country's varying terrains — limestone-rich regions, rugged mountains, and desert areas — offer a diverse array of caves.

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