Origin of photo is unknown

Not sure when this was taken, but the autos are from the 1940's.
I took this photo standing above the rock wall right above the spot where the car towing a trailer (in the first photo) was parked. Of course I was there about 70 years later.
You can see the gas pump island on the right side of the photo. At the horizon line in the middle of the photo, you can see Route 66. It was pretty much the same view behind me. We were there for about an hour and only one vehicle passed by.
I think this was the auto repair building.
I was standing on that concrete slab in the first photo. We always wonder where the people in these places dumped their trash and after poking around and finding nothing, my wife suggested that we look on the other side of the highway.
Some of this glass was fairly new (maybe 15-20 years old) and some of it had been there for at least 50 years. It looks like somebody went to quite a bit of trouble to lay this stuff out. The green piece at the bottom (just right of center) is a very old glass electrical insulator that was used with power lines. It could easily be 75, or even 100 years old. Whoever did this should have re-buried it before they left. In case anybody is wondering; NO! We didn't leave with a single souvenir. We want the next person who comes this way to be as excited as we were to find history just laying there waiting for them.
No idea about this one, I just liked the way it looked.
Look how thick the green glass is. You don't see that much anymore.
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