Established in 1888 by Gustav Heineman, a German immigrant, this Put-in-Bay winery offers island tourists a tasting bar, a wine garden, and a gift shop. Tours of the Crystal Cave are also available. Touted as the world’s largest geode, this cave located 40 feet under the winery was discovered by workers digging for a well in 1897. Historically known for its sweet wine, the most popular wine is Pink Catawba. Other native grapes such as Ives, Delaware, Concord, and Niagara are also grown on the island. Ohio’s oldest family owned winery, today the winery is still run by the third, fourth and fifth generations of Heinemans.