This primitive island off the tip of the Door County Peninsula and northeast of Washington Island in Lake Michigan offers hiking trails, the oldest lighthouse in Wisconsin and 2000 feet of beach. Vehicles are not allowed on the 912-acre island, making for an experience unlike any other Wisconsin state park. Stone buildings, built by a wealthy inventor and his family, house exhibits. The ferry to the island runs Memorial Day weekend through Columbus Day. The park is open year-round from 6 a.m. to 11 p.m.; however, the ferry only runs Memorial Day Weekend until Columbus Day