Ruins of Berdo Keep
Today on a ridge above Thoiles Town, this crumbled walled keep was the first structure that the dwarves of what became Thoiles built above ground, as military outpost. It later served as administrative buildings for the burgeoning town, but was destroyed and abandoned when a pirate fleet attacked the city (the fleet was destroyed itself when the dwarves from under the mountain emerged), and not rebuilt when the Town was.
Technically off limits, many would-be adventurers sneak in anyway to explore its underground recesses.