While hiking in Lost Valley, we came across this passage (which is filled with water in the spring). Beyond this was a tiny opening that led to a deep cave. We follwed the cave for a while, but we couldn't get too far without the proper gear.
In this photo, Wags and I were hiking up the Indian Creek riverbed in search of dry waterfall sites and the Arkansas cave. What we found was this crazy hole in the ground, a frog, fish, deer and a woodchuck. It was a beautiful hike, though.