Camooweal Caves National Park was created in 1988.
The area of Camooweal Caves National Park is 138 square kilometers.
Naracoorte Caves National Park was created in 1994.
Mount Etna Caves National Park was created in 1994.
Chillagoe-Mungana Caves National Park was created in 1995.
Maquoketa Caves State Park was created in 1921.
The area of Mount Etna Caves National Park is 4,780,000.0 square meters.
Carter Caves State Resort Park was created in 1946.
Mammoth Cave National Park was established as a national park on 1 July 1941.
Mammoth Cave National Park was established as a national park on 1 July 1941.
There are 117 known caves within Carlsbad Caverns National Park.
In 1941.
Yes since 1941.