Los Angeles Maritime Museum, California

Located next to the Port of Los Angeles, the largest port in the nation, this museum houses one of the largest collections of model ships in the nation. Among the 700 detailed specimens is a 18-foot Titanic, a Department of Energy research vessel, numerous military vessels, and, though no such ship existed, there is an elaborate 22-foot model of the Poseidon, made for the 1972 movie "The Poseidon Adventure."