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. Sierra de la Ventana (mountains) - The Sierra de la Ventana (also Sierras de Ventania) is a mountain range in Buenos Aires Province and one of the only two located within the Pampas ecosystem.
A:
Natural Place