From publisher blurb:
This offering of Zero Hour Sci-Fi Settings presents another pair of digital poster images and supporting documentation. Citadel Secundus is a high-tech base of operations with everything a band of heroes or a nefarious villain could need.
The Citadel is a large, self-contained building. The main structure is two stories high with towers that vault up to four or five stories. It includes dedicated suites for seven or more primary residents and has two additional guest rooms and barracks. There are medical facilities, a computer lab, a mechanic's workshop, and a gym. Atop the main tower is a spacious command center overlooking the facility. There is a garage at ground level and a hangar bay on the roof. Underground vaults and utilities, plus a detention center and quarantine chambers, round out the amenities.
One side of the poster shows the lower levels while the other depicts the upper levels. The maps are at 1 inch = 5 feet scale and have a 1-inch grid built into the floor.