Q:The Agger is a river in Germany a right tributary of the Sieg in North Rhine-Westphalia. It is 64 km long. Its source is in the Sauerland hills near Meinerzhagen. It winds through the towns Engelskirchen Overath and Lohmar. Near Siegburg the Agger flows into the Sieg. 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?
A:
Natural Place