The crater has an icy lake at its bottom with water cascading down its eroding permafrost walls. Picture: Andrey Naumenko, 'Yamal-Region'
The crater has an icy lake at its bottom with water cascading down its eroding permafrost walls. Picture: Andrey Naumenko, ‘Yamal-Region’

http://siberiantimes.com/science/casestudy/news/first-pictures-from-inside-the-crater-at-the-end-of-the-world/