Devil's Cairn

The Devil's Cairn was a location in Aberdeen, Scotland which housed a temporal rift to the dimension of the Eaters of Light.

In the 2nd century, the Roman Ninth Legion invaded the area. The Gatekeeper at the time, Kar, allowed a single Eater of Light to pass through the portal; she thought it would destroy the legion, and become so weakened in the process that it would be easy to defeat. Instead, the creature became stronger after feeding on the Romans and began to darken the sky, threatening the world. The Twelfth Doctor, along with his companions Bill Potts and Nardole, worked with the Picts and the few surviving Romans to drive the Eater of Light back into the portal. Kar, along with several Picts and the Romans, then entered the portal to fight off the creatures.

By the 21st century, Scottish music could be heard at the hill at Devil's Cairn. (TV: The Eaters of Light)