Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. Tibagi River -  The Tibagi River (Portuguese Rio Tibagi also spelled Tibagy and Tibají) is a river of Paraná state in southern Brazil. It is a tributary of the Paranapanema River.
Natural Place