Acadia National Park
With about 49,000 acres of protected forests, beaches, mountains, and rocky coastline, Acadia National Park is the second-most-visited national park in America (after the Great Smoky Mountains National Park). According to the National Park Service, 2 million people visit Acadia each year. The park holds some of the most spectacular scenery on the Eastern Seaboard: a rugged coastline of surf-pounded granite and an interior graced by sculpted mountains, quiet ponds, and lush deciduous forests. Cadillac Mountain (named after a Frenchman who explored here in the late 1600s and later founded Detroit), the highest point of land on the East Coast, dominates the park. Although it's rugged, the park also has graceful stone bridges, miles of carriage roads (popular with walkers, runners, and bikers as well as horse-drawn carriages), and the Jordan Pond House restaurant (famous for its popovers).
The 27-mile Park Loop Road provides an excellent introduction, but to truly appreciate the park you must get off the main road and experience it by walking, hiking, biking, sea kayaking, or taking a carriage ride. If you get off the beaten path, you can find places you'll have practically to yourself. Mount Desert Island was once a preserve of summer homes for the very rich (and still is for some), and, because of this, Acadia is the first national park in the United States that was largely created by donations of private land. There are two smaller parts of the park: on Isle au Haut, 15 miles away out in the ocean, and on the Schoodic Peninsula, on the mainland across Frenchman Bay from Mt. Desert.