12 Craziest Sinkholes in the World

Siberian Mystery Hole (Russia) 1 of 13

Scientists were originally baffled by a mysterious hole found on the Yamal penninsula in Siberia. Originally it was assumed that it was a crater, but the size and shape didn't add up. The hole turned out to be a sinkhole formed from melting permafrost that exploded from built-up pressure. The crater is 262 feet wide and has a small lake at the bottom.