Please answer the following question: The Rainy River is a 22.5-mile-long (36.2 km) river in Presque Isle County Michigan in the United States. It is located in the northern part of the Lower Peninsula of Michigan flowing northwest from Rainy Lake to Black Lake. Its waters after passing through Black Lake flow via the Black River and the Cheboygan River to Lake Huron. 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