Nothing's better than spending time by the water while you're on vacation. Bring a picnic to Highland Lake and then stick around for a peaceful sunset.
You'll have sightseeing choices galore when spending time in Bridgton. Highland Lake is a good place to kick off here, but there are plenty of other worthy sights to appreciate. Shawnee Peak, Long Lake, and Pleasant Mountain are near the body of water and will fill in your day nicely.