Endland - Your Day Will Come
During the apocalypse, huge monoliths rose from the ground along the centre of Endland. No-one knows where they came from and who, if anyone, made them.
They are enormous and it is as if the catastrophic changes in the land have exposed its spine. They seem to be made from black stone, but they are extremely smooth and no known technology, weapon or tool can carve into their surface.
The Monoliths protect from the radiation that has poisoned the rest of Endland and so cities have grown around them. The Monolith of each city towers over even the tallest building, no-one except maybe the Ikarim have ever seen the top of one and they don’t talk about what’s up there.