With only a few miles away from the Canadian border is Kelleys Island and South Bass Island (also known as Put-In-Bay Island), two of Ohio's Islands on Lake Erie. On South Bass Island, we explore an underground lake, a cave full of crystals that were once sold to manufacturers of fireworks, and a house full of butterflies. On Kelleys Island, we take a look at the history behind Glacial Grooves, and the Inscription Rock.