So often we miss what's below the surface by judging things by their cover. A good example of this is a cavern. That big, ominous hole in the ground hides a beauty like no other.
During my conference trip, I had the pleasure of exploring one such majestic maze. This one was used by Jessie James and his gang in the 1870s as a hide out. The river that runs within the Meramec Caverns also operated as an escape route for the outlaws and echoed throughout the tunnels with an awe-inspiring force. I imagine that rushing tumult would be terrifying in the pitch dark.
Here's a couple pics to tickle your fancy. One's inside the cavern. One's outside.