Lower Cairn was a well-established village with a population of more than two hundred residents. It had natural barriers in the form of mountains, narrow passages, and rocky terrain.
Despite Lower Cairn's defensible terrain, at some point prior to the Grimm attack on Vale the village was overrun by a large number of the creatures. The villagers sent out a distress call, seeking assistance from Huntsmen.
After its destruction, the few survivors found their way into the caves in the surrounding mountains and successfully hid from the Grimm for days before Team CFVY tracked them down for rescue. By the time of the team's arrival, the village had been flattened. All but a couple of stone buildings near the edge of the settlement had been demolished by a Goliath while Ursai and Beowolves inhabited the settlement, pantomiming a dark parody of the residents they had removed in their attack.
- A Cairn is a mound of rough stones built as a memorial or landmark, typically on a hilltop or skyline. It's also the name of a breed of dog, described as a small terrier with short legs, a longish body, and a shaggy coat.
- Team CFVY's return from their mission to Lower Cairn was featured in the episode "Field Trip" in Volume 2.