Headquarters Creation

(I have no pre-made template for this... So it's loose)

Location - Either on this planet, or in a different dimension

General structure - Size, composure, material it's made of, any form of barriers

Origins - How the structure came to be, was it used for anything else?

Interior designs - Explain how it looks inside, how many rooms, decor

Also, post what the rooms are used for and what they are, and post any other information
I know this is sloppy, but you should know how to make things look nice.