If you annoy the Lady of Pain, you will find yourself in this maze.
Points of Interest
The Player's Maze is set up like a clock. First find a path to the 1 position and pick up the Brimstone Hammer and the Bone-Framed Journal. Examine the journal, then make your way back to 4 and go though the portal. From where you end up, walk all the way back to the portal at 4. It will then take you to the exit portal.