In Siberia there is a huge crater and it is getting bigger

Near the Yana river basin, in a vast area of permafrost, there is a dramatic tadpole-shaped hole in the ground: the Batagaika The crater is also known as a "megaslump" and it is the largest of its kind: almost 0.6 miles (1km) long and 282ft (86m) deep. But these figures will soon change, because it is growing quickly. Locals in the area avoid it, saying it is a "doorway to the underworld". But for scientists, the site is of great interest.
Read more: http://www.bbc.com/earth/story/20170223-in-siberia-there-is-a-huge-crater-and-it-is-getting-bigger?source=Snapzu