Answer the following question: Rock Creek (Potomac River) - Rock Creek is a free-flowing tributary of the Potomac River which empties into the Atlantic Ocean via the Chesapeake Bay. The creek is 32.6 miles (52.5 km) long with a drainage area of about 76.5 square miles (198 km2). The last quarter-mile (400 m) of the creek is affected by tides. Given a choice of categories company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, the text refers to which one?
Answer:
Natural Place