The Witch Shack (d20)
They told you the place was haunted¸ but you just had to go in anyway.
The Witch Shack is an encouter¸ an adventure location and a trap all in one!
Once you enter there's no easy way out. The hallways are a shifting maze and behind each door is a new random horror.
Check out my other works The Place of the Skull and Colony of Death