The VAB was built to house a completely assembled Saturn V - with six inches of clearance - on each side (only one half of the building's interior is shown here). These pictures don't do the building justice, it is truly an immense space.
The Space Shuttle Endeavour
The Endeavour was being stored in the VAB while many of its components was being cleaned for its eventual display at the California Science Center in Los Angeles.
In this state, it reminded me of looking at your grandfather's Buick, but it was remarkable to get that close to it.