They see an evolving Earth inside of a cave. Granted the Earth's changes are very slow. According to DeLong, scientists estimate that stalactites and stalagmites grow one square inch per 500 years. Look at them, then, as unfinished works of art millions of years in the making. Hawn says he has seen time and time again.
People think of caves as black holes filled with bats.
That once you've seen one, you've seen them all. But that's simply not true. And just looking at the caves in Pennsylvania, you'll see that's true. Penn's Cave is an all water cavern, toured by boat. They are surrounded in their own legends, unique in their histories.