Workers at Heineman’s Winery discovered in 1897 what would later be identified as the world’s largest geode, right on Put in Bay Island. Visitors to the Put in Bay can share the wonderment on guided tours, offered daily for $6 for adults and $3 for children. Venture 40 feet below South Bass Island’s surface to enjoy this island attraction!

978 Catawba Ave., Put-in-Bay, Ohio 43456