Please answer the following question: 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. Usa (Germany) - The Usa is a river that is 34 km (21 miles) long in Hesse Germany. It is right tributary of the Wetter which it joins at the outskirts of Friedberg. The principal towns along the river are Usingen Bad Nauheim and Friedberg.
A:
Natural Place