Acadia National Park protects the natural beauty of the highest rocky headlands along the Atlantic coastline of the United States, an abundance of habitats, high biodiversity, clean air and water, and a rich cultural heritage. Each year, more than 3.3 million people explore seven peaks above 1,000 feet, 120 miles of hiking trails, 45 miles of carriage roads, 17 stone bridges, and four lighthouses. – http://www.nps.gov