The hole tripled in size between 1991 and 2018, according to the US Geological Survey. The Batagay crater, sometimes referred to as Batagaika or the "gateway to hell," represents a much larger ...

Officially known as the Batagay (also spelled Batagaika) crater or megaslump, the crater was first spotted on satellite images in 1991 after a section of hillside collapsed in northern Sakha in ...