It is said that there are seven levels to the underground complex known as the Drevansic Warrens, but those are only tales from an earlier time. Clethus Strongbow reported that he had been to three levels, and then never returned while exploring for a fourth.
A weird, twisting mess of odd shaped rooms and bending hallways. This is principally an intermediate level, to be used with a larger complex, with stairs leading both up and down.
As usual, feel free to use for any non-commercial purpose, or contact me if you’d like to use this on a commercial project.