The Arkansas Inland Maritime Museum is a maritime museum located at 120 Riverfront Park Drive, North Little Rock, Arkansas which opened on May 15, 2005. Its primary attraction is a World War II submarine, which later served in the Vietnam and Cold Wars. The submarine was later commissioned into the Turkish Navy before becoming a museum. It is arguably the longest-serving submarine still existing in the world, having been commissioned by the United States and Turkey for 56 years of active duty.