Inscription Rock, on the south shore of Kelleys Island, is marked with prehistoric Indian pictographs. The flat-topped limestone slab displays carvings of animals and human figures. Discovered partly buried in the shoreline in 1833, the 32 foot by 21 foot rock is now exposed. Much eroded by the elements, it is now protected by a roof and viewing platform. Archaeologists believe the inscriptions date from sometime between A.D. 1200 and 1600.