Take a look inside a giant hole in the desert which has been on fire for more than 40 YEARS

The hole (top left and top right) in the heart of the Karakum Desert was created in 1971 when a drilling rig used by Soviet geologists collapsed. The team decided to burn off poisonous gases inside the crater but the fire, which they believed would be out within days, is still going (bottom right). Visitors stand at the edge of the hole (bottom left) in Derweze, Turkmenistan, to watch the flames.