Caves are one of the last unexplored territories on earth!

Besides our oceans, there are very few places with as much unseen territory as caves. Because they are so difficult to get to, they often remain unspoiled by trampling feet and human development.

There are many detailed mineral formations and beautiful objects in caves. They also provide valuable scientific research.

See the full set of cave photos from Mona Island, California, and New England.

Palmer's cave, large room