Answer the following question: Liva (German: Lyva Lyua Libau) was a famous river in Kurzeme in today's Latvia. It was located between the Baltic Sea and Liepaja Lake and had a length of about 6 kilometres and a width near the mouth of about 50 metres. The source of the Liva was located in Liepaja Lake near the former Perkone river. The place where the Liva fell into the Baltic Sea was located approximately at the site of today's northern harbour in Liepaja. 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?
Answer:
Natural Place