A former flooded mine three kilometers away from Baia Sprie has been a constant fascination for locals and tourists alike. Known under the name of the Blue Lake, this is the only one in the world that changes color, according to light or the people swimming in the lake, scrie skytrip.ro.
The famous lake covers an 0.5 ha surface and is located in a small water pool formed after the mining quarry was blown away in 1919- 1920. The lake has an anthropic origin. From one shore to another, it covers a 40-50 meter diameter and has a 4 meter depth. The lake has an elliptic, almost circular shape.
Local legends
Observed up-close the Blue Lake has the shape of a volcano crater, which has encouraged several local legends referring the way it was formed. Some locals believe it actually covers a much bigger surface, stretching to the Black Sea in its underground water.
There are also locals who fear their houses would cave in at any time because of the depth of the blown away quarry.
The lake water is full of sulfides, so its color is actually strong green, with blue nuances. When several people swim in the Blue Lake, the water changes color again. It also changes according to the light.