Lake Rândunica (, also called Lacul Sf. Ioan) 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.
Name Lacul Rândunica means the swallow lake.
History The origin of this lake is the abandonment of the "Nepomuceni Johann Grube" salt mine. The salt mine was exploited between 1722-1877 using the bell system with two wells up to the depth of .
Information Surface: Maximum Depth: Salinity: 120 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)
References