I always found Batman's tags and labels helpful and inspiring to a kid who wanted to build his own Batcave. At one point I worked with some friends to renovate an abandoned horse shed into a secret hideout. Although fun, it was never as impressive as Batman's Batcave from 1968. Under Wayne Manor, Batman has it all: a lab, computerized crime files, trophy room and Batplane hangar.
While the Batcave was awesome, the Dynamic Duo's utility belts totally confused me. They always seemed to have the right gimmick stowed away, but these detailed drawings are pretty limited.
Time hasn't been kind to the utility belts. "Self-sealing flaps" are about as fancy as Velcro, and nearly everyone has a two-way communicator (cell phone, duh!).
This last panel is from a story where Batman and Robin design a new Batplane. I don't think I'd like to have to use the "human ejector tubes."