The glacier buried Scotland under 1km of ice. Image Credit: YouTube / Max Van Wyk de Vries
A new video shows just what a 1km ice sheet would actually look like next to the Scottish city of Dundee.
One of the most impressive spectacles in the hit TV adaptation of George R.R. Martin's 'Game of Thrones' is the enormous ice wall that borders the northern edge of the Kingdom of the North.
While such a structure might seem impossible in the real world, there was a time when a wall of ice that was much taller and a lot more extensive than the one in Game of Thrones actually existed.
Back during the Ice Age, a large portion of the Northern Hemisphere - and in particular Scotland and the majority of the British Isles - was covered in a huge ice sheet over 1km thick.
Now a new video created by lecturer Kieran Duncan and glaciologist Max Van Wyk de Vries shows exactly what this huge glacier would look like if it happened to be placed next to a modern city.
The sheer scale of the ice wall is breathtaking and totally dwarfs Dundee's 571ft Law hill.
"Part of the film shows what a 1 km ice sheet would have looked like on top of the [Dundee] Law, and I remember my mind being blown when Max first told me about that," said Duncan.
"You hear numbers like that, but it's only when you see what that would have looked like in relation to something like the Law, which towers above the city, that you really start to conceive of just how massive this glacier was."