Seawolf park is unique in that it has a submarine, and the remains of a merchant ship, and a destroyer escort designed to conduct antisubmarine warfare—the hunter, hunted, and the protector—all in one museum area. It is the home of two preserved U.S. Navy ships, the Gato-class submarine USS Cavalla (SS-244) and the Edsall-class destroyer escort USS Stewart (DE-238), and the remains of the World War I tanker S.S. Selma, the largest concrete ship constructed, can be seen northwest of the park's fishing pier at . Also preserved at the park is the conning tower of the Balao-class submarine USS Carp (SS-338) and the sail of the Sturgeon-class nuclear attack submarine USS Tautog (SSN-639).