Imperial lighthouse set on Saros Archipelago. Was plundered during the siege of Firemoth.
Try to make the interior neutral in terms of its overal state, so it could be used in both the ruined and the restored versions of Firemoth. You may add a couple of ruined objects that will be swapped via a script for a restored version of the interior.
An activator shrine of the Little Key Cult, a powerful cult of Clavicus Vile with a large following in Cyrodiil. Should depict a seated dog, potentially with a key in its mouth. See attached fresco painting by Ateiggaer for the vibe.