The largest natural refrigerator is operating in the Urals, at the Pay-Khoy ridge. This is the northern tip of the spurs of the Polar Urals, reports chelTV. A refrigerator is called permafrost, which is cut down on the eastern shore of Novy Port, three hundred kilometres from Salekhard.
The giant warehouse was built in the middle of the 20th century, and it is still in use. The refrigerator stores the catch of a local fish factory. The area takes about one hectare, and the length of the corridors exceeds a kilometre. The temperature there even in summer is from -10 to -14 ° C.
The system of tunnels at a depth of 20 meters with a total length of moves of 1300 meters, the maximum distance from the entrance is about 200 meters, and it can contain up to 2500 tons of fish. The store works mainly during the spring season from April to June.
The building of the permafrost took a decade. Ice tunnels were cut out manually using scrapers, shovels and picks. It is not only a unique engineering structure but also a historical monument, which is opened for tourists.