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. Plapcea River -  The Plapcea River is a tributary of the Vedea River in Romania. It starts at the junction of headwaters: Plapcea Mare and Plapcea Mică
A:
Natural Place