Arglebargle! lovingly compiled a bunch of cutaway drawings of the Fantastic Four's Baxter Building.
One of the great things about the Fantastic Four comics was all the super-nutty Kirby gizmos and gadgets. Crazy stuff --like James Bond gear on steroids and acid! And talk about high maintenance... the team needed enough space for a Fantasti-car, a Pogo Plane, a Fantasti-Copter, a Private Passenger ICBM, an Observatory, an entrance to the negative zone, a computer room, a chemical lab, a photo analysis lab, a projection room, a gymnasium, trophy room and living quarters (just to name a few).Link