A short drive south from downtown Portland, this 1794 lighthouse is one of the most picturesque in the nation. You’ll probably recognize it from advertisements, calendars, or posters. The light marks the entrance to Portland Harbor and was occupied continuously from its construction until 1989, when it was automated and the graceful keeper’s house (built in 1891) was converted to a small, town-owned museum focusing on the history of navigation. The lighthouse itself is still active, and therefore is closed to the public, but visitors can stop by the museum or browse for lighthouse-themed items in a gift shop. The surrounding grounds of Fort Williams Park are great for picnics; if you’re traveling with kids, plan extra time for them to enjoy its two playgrounds and a brand new children’s garden full of winding paths, hopscotch stones, and tunnels.