Lake of the Blessed Prince

From PathfinderWiki

The Lake of the Blessed Prince sits towards the south-western side of the centre of the Arcadian nation of Xopatl. The lake's most prominent feature is a truly colossal underwater keep that sits at the lake's centre, the keep was the home of an ancient hero-god who chose to submerge it upon his ascension. The town of Bundózo sits on the shore of the Lake of the Blessed Prince and much of its economy is based around dives into the sunken keep to dredge up its lost treasures.1