I’ll have to disagree on Bar Harbor, but yeah - go see Egg Rock Lighthouse. I spent a lot of foggy summer days listening to it! It’s just off the frame in my pic above. Take the Ferry from Bar Harbor to Winter Harbor. Go eat crab rolls in Corea.Don’t skip Bar Harbor! It’s a fun time. Take in the sunset from the docks. Walk the sandbar at low tide. Boothbay too. See the lobster boats come in. Hike and explore beaches in Acadia, Cadillac Mountain, tidal pools, etc. Take a boat to see Egg Rock puffins, visit a heath bog, eat lots of lobster and lobster rolls, hike the start of the Appalachian Trail on Katahdin, see moose, fish for mackerel, canoe and kayak virtually anywhere, listen to the loons, collect mussels from shore to eat, blueberries if in season, go antiquing, stop at garage sales, shop for a hand-carved decoy, go to LL Bean, look into all the pottery shops, hit some breweries, drink a blueberry ale. Its overall a chill, fun place to visit.