Quick Robin, to the Batcave!
This gorgeous map of the Batcave shows exactly how Batman manages to fit all his cars, boats, helicopters and planes in. No, seriously there's a plane in the Batcave. There's a whole runway in fact.
This lithograph is titled Secrets of the Batcave and it was drawn by Dick Sprang back in 1995 (sadly Sprang passed away in 2000). Sprang drew a large number of Batman and Detective Comics issues between 1943 and 1962 though during that period everything was basically credited to Bob Kane.
I love the golden age style here and the larger than life impracticality of this Batcave.