One of the most mysterious places in Russia is in the Volgograd region, near Zhirnovsk. Blue Mountain, Slope mad lightning, drunken grove of birches, Devil's lair, and many other names have been given to the central hill in Medveditskaya ridge, one of the highest points (293 m) of the Russian plain.

Every summer Medveditskaya ridge attracts many tourists and researchers who want to understand and see the unexplained phenomena of nature and their consequences. On the slopes of mad lightning occur regularly light phenomena in clear weather, a sudden stop of car engines and flying helicopters, changing the behavior of people and animals. Very often, tourists are told about hallucinations (UFOs, ghosts, humanoids) and about the oppressive conditions in the territory of the slope. Documented hundreds anomalous zones: a wandering ball lightning on a clear day, the concentration of the clouds on the top of the mountain, a regular match routes fireballs and burning certain areas. The most memorable on the slope - distorted trees, scorched from the inside. Many simply twisted, but there is a spiral-shaped.

On Medveditskaya ridge seen three anomalous place, some geopathogenic points and "damn" place called Devil's lair. It is also noteworthy parched places of various shapes (mostly triangular shape), at a distance of two hundred and located meters from each other and located on the slopes of the Blue Mountains. In such zones are failing clock, crystal oscillators, cameras and any other precision machinery. When archaeological studies have found the cave with smooth walls (like during firing), one of which extends up to 35 meters, forming a huge hall.

Blue Mountain ridge and Medveditskaya attracted researchers, academics and local historians long before the present day. The most famous expedition was carried out: the investigator PS Pallas (1773-1774 gg.), PA Bakhmetyev (1850s), local historian Peschilin (1920-1930 years), B.Gusev, A.Gayvoronsky and repeatedly in the 1850s, the visit this unique place novelist EP Blavatsky.