Squire Boone Caverns: Site of Historic Boone's Mill (GM-05)
In 1804 Squire Boone and his family returned to settle in Grassy Valley, where the caves are located. Boone and his four sons cleared the land and built a large cabin and the first gristmill in Harrison County. Water from a huge spring flowing from the entrance of the larger cave powered the mill. After Boone's death in 1815, his remains were interred within the small cave.
In 1973 new entrances were blasted and steel bridges were constructed. Restoration of the mill, which burned in the 1920's' was completed in 1980. The mill, with a 150-foot-long raceway and an 18 foot 3 ton overshot waterwheel is the highlight of the village.
Our Hoosier State Beneath Us: Geomorphology