Explore the world's largest collection of historic naval ships with four admission tickets to Battleship Cove in Fall River. Battleship Cove features the Battleship USS Massachusetts, the Attack Submarine USS Lionfish and the Destroyer USS Joseph P. Kennedy, Jr., Soviet-Built Missile Corvette Hiddensee, PT Boats 617 & 796, as well as the National PT Boat Museum, the National Destroyermen's Museum, and the Fall River Carousel. Admission tickets are valid until 10/31/11.