The Heineman Winery on Put in Bay makes the wine they sell! Gustav Heineman started the Winery in 1888. He was originally from Baden, Germany. The fertile soil and extended growing season make Put-in-Bay a great place to grow grapes. Due to Lake Erie being warmer than the air in the Fall, the island is warmer than the mainland. Consequently, grapes have more time to grow and mature. Also, while at this Winery guests can tour Crystal Cave. Crystal Cave boasts the World's largest geode. These large crystals are a sight to behold. Guests can opt for a cave tour that comes complete with wine tasting. Come and taste the local flavor at this island favorite.