If you want to park a lot of cars in a very small space, just make a massive tower like this. The cars are deposited onto pallets and recalled to the entrance when the owner arrives. No need for driving around to park your car, just drive it into the entrance and the conveyer system takes care of the rest.
FILE NAME: P4299052.JPG | DATE: 29.04.2007 12:25:18 | CAMERA: OLYMPUS IMAGING CORP. (E-500 ) | RESOLUTION: 3264 x 2448 | NATIVE FOCAL LENGTH: 14.0mm (35mm FOCAL LENGTH: 28mm) | FLASH: Flash did not fire, auto | EXPOSURE TIME: 1/250 sec | METERING MODE: Multi-segment | EXPOSURE MODE: Auto exposure | APERTURE: F9 | ISO SETTING: 100
