Ruins of Cantona

Cantona was originally a fishing village founded about 200 years ago. It had grown to nearly six hundred residents by the time a Suloise mage named Valterra settled here in the year 495 CY. Being rather paranoid, he bought several buildings in the middle of town, then had them torn down and rebuilt to unique specifications. The buildings were asymmetrical, used strange angles, and were decorated with enchanted woods, ensorcelled paints, and magical mortars. The result was that the buildings were immune to scrying, teleportation, evocation spells, the entry of summoned creatures, and other sorts of invasive magic. Over the decades, this magic degraded, and when Valterra died, the spells went totally awry and affected the entire town.