Lake Rândunica (Romanian: Lacul 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.
Lake Rândunica | |
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Lacul Sf. Ioan | |
![]() ![]() Lake Rândunica | |
Location | Ocna Sibiului, Sibiu County, Transylvania, Romania |
Coordinates | 45°52′23″N 24°03′59″E |
Type | Salt lake |
Native name | Lacul Rândunica (Romanian) |
Surface area | 2,149 m2 (23,130 sq ft) |
Max. depth | 46.54 m (152.7 ft) |
Salinity | 120 g/l |
Lacul Rândunica means the swallow lake.[1]
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 80 metres (260 ft).