None of the original internment camps are still standing. Some have been rebuilt for historical reasons, but none of those have the original numer or placement of buildings.
"Crystal City" was filmed at a former US Army Air Core (Now US Air Force) base, in the original barracks buildings that US service men lived in during WWII.
One of the buildings has been restored by a local historical society, the others are in the state of exposure to the elements for 70 years. Considering that, they are in terrific shape!