Last month my wife and I had the opportunity to visit Mystic Seaport Museum in Mystic, CT by boat. We spent two nights there and absolutely loved it. Visiting by boat makes for an incredibly immersive experience. Slip fees include admission to the entire Seaport grounds and displays, with the added bonus that you have the place to yourself after business hours!
If you are a boat nut and haven’t been here, put it on your list! These pics represent a tiny fraction of what is on display here. See the website linked above for more info.