And it’s even better when that time is spent at Acadia National Park. Getty Images Getty Images loading...Acadia National Park is the Perfect Destination in AutumnIt’s the perfect spot—a park loaded with ideal activities for any time of year, especially on cooler days. Is Acadia National Park One of the Best in America During Autumn? Acadia was listed as the third best in America—right behind Great Smoky Mountains and Rocky Mountain National Parks. 10 Of Maine's Most Beautiful Lesser-Known Hiking Trails Everyone knows about the incredible hiking trails in Acadia National Park and Baxter State Park, but Maine has so much more to offer.