Colón is a city and seaport in Panama, beside the Caribbean Sea, lying near the Atlantic entrance to the Panama Canal. It is the capital of Panama's Colón Province and has traditionally been known as Panama's second city. City proper located entirely on Manzanillo Peninsula, surrounded by Limon Bay, Manzanillo Bay, and the Folks River. Since the disestablishment of the Panama Canal Zone, suburban corregimiento of Cristobal to include Fort Gulick, a former U.S. Army base, as well as the towns of Cristobal and Margarita; and recent corregimiento of Cristóbal Este now include the town of Coco Solo.