Medveditskaya Chain, located 15-18 kilometres from the city Zhirnovka of the Volgograd region, is a chain of hills with height 250 metres approximately considered one of the main anomalous zones in Russia. It’s a place where car brakes failure may occur at any moment, where watch starts to go wrong, where one may come upon silvery fog that leaves burns on people’s skin.

Witnesses claim that it’s a place teeming with paranormal phenomena: despite UFO that emerges there almost every week Medveditskaya Chain also attracts globe-lightings in enormous quantities. They say that sometimes it’s possible to see several lightning balls floating peacefully above the Earth’s surface simultaneously. The balls normally burn their way through trees, and indeed, one can notice plenty of burnt trees in the nearby area. Moreover, it has been fixed that globe-lightings normally appear over two underground caves which, according to the local old-timers, are two flat parallel tunnels with even and flat walls and length from 6 to 20 metres. There are several versions on the nature of the underground tunnels: they are though of as old military bases, faults, creation of an ancient civilization or aliens' base – every version beats the previous one in incredibility.

Besides, the area is also famous for its Devil’s residence. One of the enthusiastic researchers of the place writes: “Characteristics and nature of the Devil’s residence still haven’t been explained by specialists as well as they can’t find any means for fighting with everything that goes on in this zone. Tell, please, our machanisators how to make an even rut: every time a new rut made by an experienced tractor driver appears crooked next morning. November 11, 1990, there was an accident which took place 30 steps from the back-road, right in the centre of the Devil’s residence. The local cattleman Bisen Mamaev was tired and sat on a jag to have a rest. According to the protocol, the cattleman’s assistant found the burnt Bisen Mamaev's body lying on the ground without any signs of struggle or resistance to fire. The death, probably, came to the man from inside. The autopsy showed that the young organism was fully alright prior to the death and that the maximum burn was located round the spine and internals while the skin was only charred and went black”. This detailed comment belongs to Vladimir Chernobrovu, coordinator of the research organization Kosmopoisk, which specializes on research of everything unusual. Members of the organization have led the research operations in Medveditskaya Chain for two decades.

Apart from UFO, mentioned in the beginning of the article, here there have been also noticed strange spherical, triangle-shaped and luminous objects. This anomalous zone keeps a lot of secrets, including water springs: one with distilled water and the other one is radioactive. It seems science could find a lot of research materials in the area; however, the place hasn’t been visited by official scientists apart from amateur enthusiasts.