It contains several rooms that they regularly use, including:
- A lab for Donatello (which is accessible through his bedroom).
- An eat-in kitchen.
- A TV room.
- A practice room for their ninjutsu training.
- Splinter's bedroom.
- A large hallway that leads to the Turtles' rooms.
- Four small roomlike areas that the Turtles use as bedrooms.
- A hangar for the blimp.
- A small armory with spare weapons.
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