"The SS Ticonderoga (1906)"
One of the centerpeieces of the Shelburne is this paddle-wheeler, one of only 2 left in the world. The other is the SS Eureka on San Francisco's Hyde Street Pier. It's a gorgeous piece of history, containing lots of interactive displays about the boat and life on it.
Inside is a working model of the ship's engine, redecoarated quarters for the passengers and crew, and the gorgeous dining room.