🇺🇸 Columbia, United States

Columbia is the capital city of the United States and has a population of approximately 700,000 people. It is located in the central part of the country, between the states of Maryland and Virginia. While it is not a coastal city, it does have access to the Chesapeake Bay via the Patapsco River, making it of interest to seafarers and shipowners. There are several ports and shipyards in the surrounding area, including the Port of Baltimore, which is one of the busiest ports on the East Coast of the United St