- Ground floor. The entrance door is black rusted shut. It appeared the floor was flooded numerous times. It has at least 5 rooms and in the middle of the hall there is a staircase to the top.
- 1st floor. 6 rooms. All the doors are locked.
- 2nd floor. 6 rooms. All the doors are locked.
- 3rd floor. 2 or 3 rooms. Kouichi's Group found a Key that lead to a room 303. Inside the room there is a desk, high-tech equiments, an aquarium and a Map on the wall.
- 4th floor. 6 rooms. All the doors are locked.
- 5th floor. Rooftop. It was almost empty, except a bell jar and a barrel with a mummified Jennifer Hackmen inside.
Tower of Death arc
On chapter 174, it has been revealed that it used to call "Spiral".