Lacul Negru (meaning the black lake) is a natural salt lake in the town of Ocna Sibiului, Sibiu County, Transylvania, Romania. It is one of the many lakes of the Ocna Sibiului mine, a large salt mine which has one of the largest salt reserves in Romania. It has one of the smallest depths of all the lakes, with its maximum depth only reaching about .
Name The lake's name is The Black Lake, because the lake has mud at its bottom, making its water black. The salt mine only has two lakes with mud: Lacul Negru and Lacul cu Nămol (meaning the lake with mud).
History Lacul Negru originates from three small salt lakes.
Information Surface: Maximum depth: ~1 m Salinity: 280 g/l
Lakes of the salt mine Auster Lake Avram Iancu-Ocniţa Balta cu Nămol Brâncoveanu Cloşca Crişan Lacul Fără Fund Gura Minei Horea Mâţelor Negru Pânzelor Rândunica Verde (Freshwater lake) Vrăjitoarelor (Freshwater lake)
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