Iruvanjippuzha or Iruvazhinjipuzha is a major tributary of River Chaliyar and joining to Chaliyar at Koolimadu near Cheruvadi. Its major tributary is Chalippuzha which joins with it about 3 km north of Thiruvambady town. Other tributaries are Muthappanpuzha (joining at Anakkampoyil) ulingappuzha (joining at Thiruvambadi) and Karamoola river (join at Mukkam). 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?
Natural Place