Looks like the Viking underworld has a Georgian vibe to it!
These two towns 'fell' (planeshifted, I guess?) into the underworld after the plague killed the inhabitants. Some of the houses were burned in a failed attempt to contain the plague. The vikings can see the spirits of the inhabitants circling the towers. The guardians of this place have set up wards such as crosses and statues to keep out evil spirits. The mountain in the back represents the way out.