1 Best Sight in Blue Hill Peninsula, Maine

This half of Isle au Haut is part of Acadia National Park and has more than 18 miles of trails winding through quiet spruce woods, along beaches and seaside cliffs, and over the spin of the central mountain's ridge. The park's small campground, with several lean-tos, is open from mid-May to mid-October and fills up quickly. Reservations are essential.