Of possible interest to Seekers, new covenants in Thebes, or storyguides.
news.nationalgeographic.com/2015/11/151119-lost-island-aegean-kane-sparta-athens-archaeology/
The city of Kane was lost c. 30 BC - it is near a battle site of the Peloponnesian War and was a trade center. It is likely not a major find with vast magic, but it could be the site of some some small critical item, spirit, temple/shrine, or such. The ghosts of the battle may involve a story or resolution.