Santa Fe depot at Cushenbury, Calif. Looks like it was newly constructed when the pic was taken.
Without the description, there's no way you'd connect this building with railroads. It's a roadside fast-food outlet, or more specifically the projection booth and snack bar of a drive-in theater. Did Santa Fe borrow the blueprints from a drive-in?
Here's a Googlestreet that seems to be the same general area, with a possible old grade on the right. Desert, lots of mineral and gravel action now using the highway instead of the railroad.
The current icon shows Polistra using a Personal Equation Machine.