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.
Chat with our AI personalities
No, Long Island is not the largest island in the US. The largest island in the US is the Big Island of Hawaii.
Cavern, grotto, the French word for (Cave) is Grotte.
California contains the largest number of Asians in the US.
The largest deposits of sphalerite is found in the US.
Pittsburgh, Pennsylvania is home to the largest natural gas field in the US, known as the Marcellus Shale field.