This is the first of an occasional series. Rather than making a complete dungeon map, this is just a fragment that could be part of a larger complex. It could serve as an encounter location or be used to connect between two otherwise unrelated maps.
When I found the original for this, at first I thought it was an unpublished map. But, this is actually a variant on the map for the Dungeon of Corners from this past summer. I just embellished this one by adding some thicker lines for a shadowed wall effect.