Q:The Allegheny River /ælɨˈɡeɪni/ is a principal tributary of the Ohio River; it is located in the Eastern United States. The Allegheny River joins with the Monongahela River to form the Ohio River at the Point of Point State Park in Downtown Pittsburgh Pennsylvania. The Allegheny River is by volume the main headstream of the Ohio River. 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