• Lake Blue
Altai Territory, Tretyakovsky District
Goluboe (Lazorevoe) Lake is a natural monument of the Tretyakovsky region. The lake was created by nature with the help of man on the site of a former quarry for the extraction of copper sulfate.
Now the former mine is called the Blue Lake, because the quarry, dug to a depth of 77 meters, was filled with water.
Photo: Alexey Zyryanov

Where is

Tretyakovsky district, near the village of Semenovka, 45 km from the village of Staroaleiskoye