One of the world's deepest open pits located in Bashkortostan. It is formed in place of the copper-zinc and copper-sulfur-pyrite deposits. When the diameter of two kilometers, the depth of the pit reaches more than five hundred meters. Even standing on the edge of the observation deck of the enormous crater bottom to see not possible.

History of education career began at the end of 1912, when one of the local hunters near the hole dug by marten, found a heavy red clay with unusual crystals and took a few bags of "wonder land" scientists for analysis. The results of studies of soil exceeded all expectations - discovered in the clay attended the ironstone mixed with precious metals. Next to pit was formed Bashkir copper-sulfur plant (BMSC), engaged in the extraction of polymetallic ores. A rich Deposit with impurities of gold and silver is not processed only during the Civil war.

Sibay, formed due to career is at the crossroads of Asia and Europe, in the spurs of Irendyk and four hundred kilometers from Ufa. Translated from the Bashkir language the name means "rich in copper". In our days one of the deepest sections of land is a natural resource of Bashkiria and impressive for its size attraction.