Acadia National Park -- one of the smallest National Parks in the country -- is the biggest draw in Bar Harbor, Maine. The 41,000-acre park is also one of the most heavily visited, drawing more than two million travelers per year. The park offers stunning mountain, sea and lake vistas and craggy cliffs that plunge to the surf, as well as an estimated 125 miles of trails for hiking and biking. Additional highlights include the 1,532-foot-high Cadillac Mountain and the Thunder Hole waterspout. Beyond the park, Bar Harbor (or as locals say: "Bah Hahbuh") has the charm of a quaint New England fishing village with all the attractions of a major port, and its touristy downtown area is hard to resist. Watch the lobstermen work, browse the souvenir shops, explore a museum and, of course, enjoy a Maine lobster bake.