The Omanaia River is a river of the Northland Region of New Zealand's North Island. It flows northwest from the Waima Forest first as a stream and then as a silty arm of the Hokianga Harbour. The toiwnship of Rawene stands at the point where the river meets the main waters of the harbour. 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