One of the most mysterious places in Russia is located in the Volgograd region, near the town of Zhirnovsk. Blue mountain, the Slope of the mad lightning, Grove drunken birches, devil's lair and a lot of other names were given to the Central highlands in Medveditsky ridge, one of the highest points (293 m) plain part of Russia.

Every summer Medveditsky ridge attracts many tourists and researchers who wish to understand and see unexplained phenomena of nature and their consequences. On the Slope of a furious lightning occur regularly light phenomena in clear weather, the sudden stop of the motor vehicles and flying helicopters, changing the behavior of people and animals. Very often tourists talk about hallucinations (UFOs, ghosts, anthropomorphic beings) and their oppressive conditions on the territory of the slope. Documented hundreds of phenomena anomalous zone: the wandering ball lightning in clear weather, the concentration of the clouds on the mountain top, regular route matching fireballs and burning certain areas. The most memorable on the slope - distorted trees, scorched from the inside. Many of them are just twisted, but having the shape of a spiral.

On Medveditsky ridge observed three anomalous areas, several geopathic points and "damned" a place called the Devil's lair. It also burns a variety of forms (mostly triangular), located at a distance of two hundred meters from each other and located on the slope of Blue mountain. In such zones fail watch, quartz oscillators, cameras and any other precise technique. During archaeological explorations have been found cave with smooth walls (like in baking), one of which extends up to 35 meters, forming a huge hall.

Blue mountain and Medveditsky ridge attracted researchers, academics and local historians long before our time. The most famous expedition was held by researcher P. S. Pallas (1773-1774), P. A. Bakhmetev (1850-ies), local historian Pedilin (1920-1930 years), B. Gusev, A. Gaivoronsky and repeatedly 1850s years visited this unique place, the writer H. P. Blavatsky.