The Courthouse Square part of that backlot is the same courthouse from Back to the Future, with a different paint job and some aesthetic tweaks so that it can be used in other filming without being distractingly recognizable.
It was in the Twilight Zone episode "Where is Everybody?" https://www.youtube.com/watch?v=Khvo6TH-DXc
I remember watching it more recently and when he runs down the alley I wondered if he was going to buy that almanac.