I suggest you may be able to find out from or via the National Speleological Society web-site or its other publications. Expect thousands!
The UK hasthousands of recorded caves altogether, listed across cavers' regional guide-books, but I don't know if US cavers have similar books readily available.
isn't Mammoth Cave?
No, but it is the largest island in the continental USA No, but it is the largest island in the continental USA
The largest deposits of sphalerite is found in the US.
Largest coastline in the US is Michigan...
Hawaii.
Chicago, Illinois but when the University of Nebraska Cornhuskers play at their home stadium, Nebraska becomes the 3rd largest city.
what is interesting about Carlsbad Cavern is that it is the largest room out of all natural caves
The Hall of the Giants or the Big room is the largest cavern in New Mexico and one of the largest in the world. The cavern has 357,469 square feet of floor space and can be found in the Carlsbad Caverns at the Carlsbad Caverns National Park just a short way from Carlsbad, New Mexico.
Carlsbad Caverns- it is the largest cavern in the world, and is located in southeast New Mexico.
I'll explore this cavern when I have a flashlight.
The largest discovered underground labyrinth is Carlsbad Caverns in Carlsbad, New Mexico. It has many tunnels and caves that continue for miles.Carlsbad, California is the site of the largest underground labyrinth found in the US. The total length of the labyrinth is still unknown, but the explored part of the main cavern is more than 30 miles long.
Space Cavern was created in 1980.
Space Cavern happened in 2600.
Cavern of the Fear was created in 2002.
The Cavern Club was created in 1957.
Cavern Creatures was created in 1983.
Cavern Creatures happened in 1983.
The US is the largest importer China is the largest exporter then Germany then the US