Cadillac Mountain (1530ft), the heart of Acadia, makes an exhilarating all-day hike or a leisurely drive up. The summit offers excellent views and if you have the early-morning motivation, it's one of the first spots on the East Coast to glimpse the sunrise.
After a day exploring Acadia's natural charms, it's customary to indulge in tea and popovers at the Jordan Pond Restaurant in the center of the park. In the evening hit up a snazzy seafood spot in Bar Harbor and then head to a movie at the glorious vintage cinema.