In the quest Stealing Back the Mushrooms the current map locations are showing in the two towers of the named ogres in Ango'rosh Grounds. The correct location is the ogre cave directly above the Grounds and they are both an interactive box on the ground as well as drops off Shadowmage, Mauler, Souleater, Captain Bo'kar, Overlord Gorefist, and Captain Krosh in that ogre cave.

Closing because I guess I had the option to hide unexplored locations and once I got there it showed them.