Barranquilla, an industrial, portuary, and special district, is a city and municipality located in northern Colombia. The capital of the Atlántico Department, it is the largest industrial city and port on the Colombian Caribbean region and the fourth largest city of Colombia. It lies strategically by the delta of the Magdalena River, serving as port for fluvial and maritime transportation. It is also known as the cradle of Colombian aviation and as home to a very picturesque carnival.