a cave is like an arch formed by the erosion of the sea.
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It may be, but a cave properly is any natural, subterranean cavity of humanly-enterable size, and in scale anything from a small sea-cave (as above) to vast systems of passages and chambers like Mammoth Caves.
A natural or man made rock feature in which humans live or have lived.
Carlsbad Caverns.
Linville Caverns Linville Caverns are limestone caverns located near Linville Falls in North Carolina. It is an example of a limestone cave similar to a number of others.
Caverns can be under water and underground.
Carlsbad Caverns is located in New Mexico.
Caverns of Xaskazien happened in 1995.
Caverns of Xaskazien was created in 1995.
Caverns of Zoarre happened in 1984.
Caverns of Zoarre was created in 1984.
Caverns of Mars was created in 1981.
Caverns of Mars happened in 1981.
Caverns of Minos happened in 2012.
what region is in carlsbad caverns