Please answer the following question: Zemplinska sirava (sometimes called the Slovak sea (Slovak: Slovenske more)). is a dam and lake in eastern Slovakia near the town of Michalovce wholly belonging to the Michalovce District. The name recalls the historical Zemplin region. The dam was built in 19611965 covers an area of 33 km2 (13 sq mi) has an average depth of 9.5 m (31 ft) with a maximum depth of 14 m (46 ft). Water from the dam flows into the Laborec river which in turn flows into the Bodrog river. 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