One thing that kind of bugged me about the overworld map... there's one thing on it, in the upper right region of the map, positioned approximately between the big tree and the Anvil of Dawn itself, that looks like some sort of crater with (lava? blood?) coming from it and a sort of primitive town inside. It looks like someplace you ought to be able to visit, but it doesn't have a label on the map or a dungeon you can enter in that region.

Any known story behind this? Had they planned to put a dungeon there that got cut or never added in the first place? Or is it really just something that's there for the sake of being there?