The Southern Branch Elizabeth River is a 14.5-mile-long (23.3 km) primarily tidal river in the U.S. state of Virginia. It flows from south to north through the city of Chesapeake and forms the boundary between the cities of Portsmouth and Chesapeake for its northernmost 3 miles (5 km). It is a tributary of the Elizabeth River connecting to the harbor of Hampton Roads to the north. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
A:
Natural Place