Southern Indiana has a 40+-mile system of caves along the Ohio River known as the Indiana Cave Trail. I took this picture of the grist mill near the entrance to Squire Boone Caverns. Squire Boone is the lesser known brother of Daniel Boone, and they discovered this cave in 1790. Squire and his sons established the first capital of Indiana - nearby Corydon. He carved this inscription on the cornerstone of this mill: "My God my life hath much befriended. I'll praise Him till my days are ended." When Squire died in 1815, he was laid to rest in the cave, and his casket is on the one-hour walking tour of this magnificent cavern.