The correct name for this place is The Lewes Maritime Museum at the Cannonball House. It is an old house that once had a British cannonball lodged in its foundation when Lewes was bombarded during the War of 1812. They have maritime exhibits inside - one room dedicated to local maritime navigation, shipwrecks, etc., one room dedicated to wireless telegraphs, and then the entire upstairs (two rooms & a landing) dedicated to the War of 1812 and the bombardment of Lewes. There is a replica cannonball stuck in the bricks out front, but that is not real. The real one is upstairs on display and is not stuck in the foundation anymore. Out back they have a lightship fog bell, a skiff used by Delaware Bay harbor pilots, and three cannon of the same styles used by Lewes to fire back at the British in 1812. Touring Cannonball House takes about 30-45 minutes to read everything - they have plenty of signage and are very informative, but the space itself is pretty small. The exhibits were well done. I learned a lot, as did my wife. This is part of the Lewes Historical Society, so it's either $5 per person or you can get the $10 combo ticket and see all three of their paid entrance museums (Life-Saving Station, History Museum, and Maritime Museum/Cannonball House). All are within walking distance of each other, so we did the combo ticket. We bought our tickets at the Life-Saving Station but all locations sell them. We found free parking in front of the Episcopal Church about a block away. Great activity on a rainy day, superb old aura inside the house, and very educational. Highly recommended.