Stonington Harbor Lighthouse is a small granite lighthouse at the end of Stonington Point, a short hop from Mystic. It now houses the Stonington Historical Society's Old Lighthouse Museum, with exhibits on the borough's maritime history and the fishing, whaling, and trading life of the coast.
The building is modest, but the setting is excellent: from the point you get open views across Fishers Island Sound and back toward the tight old streets of Stonington Borough.