Baltimore is a major city in Maryland with a long history as an important seaport. Fort McHenry, birthplace of the U.S. national anthem, āThe Star-Spangled Banner,ā sits at the mouth of Baltimoreās Inner Harbor. Today, this harbor area offers shops, upscale crab shacks and attractions like the Civil Warāera warship the USS Constellation and the National Aquarium, showcasing thousands of marine creatures.