Invisible Parking (Underground Parking Garage)
Using anarchy, place the 1×3 lot so that it clips into an existing building. Cars will drive "into" the building and park in the middle cell, creating the effect of an underground parking garage.
It supports parking for 40 vehicles. The attached screenshot shows the lot place out in the open, so you can see the pile of cars all clipping into each other. But normally the parked cars will be concealed by an apartment building or something that’s overtop of it.