Aircraft Carrier
This map appears in your sandbox folder under gm_cvn78
This is an aircraft carrier themed map. The carrier has many features including an interior, aircraft elevators, bridge, working landing/take off lights, catapults, and much more. It has enough room to build aircraft and the sky box is large enough for you to fly around with your contraption and attempt to land back on it. It’s pretty fun actually. You can also store aircraft inside.
I take no credit for making this.