These are the catacombs. They are mostly used by the exhibits department. Down here is also the workshops/support (COW) office. You could follow rainbow colored catacomb stairs up to the team lunch room.[1]

Head into the cafeteria.

Employees/Volunteers only:Eat at the staff lunch room.

Employees/Volunteers only:Go to the industrial kitchen.

Go help with a show in the Ground Floor Exploration Center.

[1] Thank you Shannan Lieb, Miriam Leland and Myron Stewart