Coastal Maine Botanical Gardens: Set on 295 acres of tidal shoreland, paths meander through habitats ranging from woodland gardens to a forest pond and a whimsical children's garden. It's a lovely place to spend an afternoon. (132 Botanical Gardens Drive; open daily, 9 a.m. to 5 p.m., May 1 through October 31, 9 a.m. to 6 p.m. in July and August)

Maine State Aquarium: A good option for bad-weather days, this small facility features a shark-petting tank. (194 McKown Point Road; open daily, 10 a.m. to 5 p.m. from May through August, open Wednesday to Sunday in September)