This looks to be part of the 1970s era recycling effort on campus. Believe it or not the first thing I noticed was the car in a spot where I wasn’t expecting to see a car. Next I saw the aggressive implements being used to load the cans into some sort of truck. And finally I gave in and spent quite a bit of time staring at the cans themselves. You could probably date this pretty close just by the cans. So much Tab!
Bonus: It’s the northeast corner of the Physics Amphitheater.