While Ruins may or may not contain underground sections for explorations, the 3 dungeon locations on the map are certain and sure to contain at least 2 full levels of dungeon chambers. The upper level will be the same EDL as the surrounding zone, but the lower levels are likely more deadly.
D1–Dungeon of Morthonk
D2–The Dungeon of Hobgoblin Rufus
D3–Dungeon of Latynadio