In 2014 the news was full of the remarkable sinkholes that appeared out of nowhere on the Yamal Peninsula, presumably due to an explosion of methane trapped underground. Unfortunately since then they have filled up with water and now look like ordinary tundra lakes. However, there are much more impressive sinkholes in other parts of Arctic Siberia that are not filling up with water and are getting deeper every year.
So far we have only taken one Japanese film crew to it and it has yet to be picked up on by the Western media. This is due to the area’s isolation and the fact that, unlike the Yamal Peninsula, it does not have Gazprom helicopters flying over it every day.