Question: The Swalm (-Dutch German: Schwalm) is a small river in Germany and the Netherlands tributary to the river Meuse. Its source is near Wegberg in the district Heinsberg south-west of Monchengladbach in North Rhine-Westphalia (Germany). The Swalm flows through Wegberg and Bruggen before flowing into the Meuse just across the border with the Netherlands in Swalmen. Its total length is 46 km. 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?
Answer:
Natural Place