The Luna Lair is where Luna Girl plans her motives to wreak havoc in the city. It is also the home of her moths that help her with her evil schemes.
The lair itself is in the shape of a sphere and has a door that comes down from above for Luna Girl to come out of. It is silver and has the ability to float away. It also has some defense mechanisms, such as a force field to keep intruders away, and an automatic Luna Beam to capture and immobilize those attempting to break in.