The school seen in Angel Beats! is loosely based on Kanazawa University Kakuma Campus in real life.
Image from Episode 1 - 02m04s
The stairs where Otonashi meets Yurippe for the first time.
Image from Episode 1 - 15m16s
These stairs lead up to the north area of the Kanazawa University Kakuma Campus.
Image from Episode 13 - 19m05s
Closeup of the stairs. You can see the water running on the left side.
Image from Episode 7 - 01m33s
The stairs curve in real life. The university buildings in the background got the same colours as in the anime.
Image from Episode 2 - 01m33s
Close to the stairs there's also this rock with the name of the university written on it.
Image from Episode 1 - 15m26s
This is a bridge connecting the north and central areas of the Kanazawa University Kakuma Campus. There's a winding staircase on the other side of the bridge like in the anime, but I didn't get a picture of that side.
Image from Episode 1 - 21m00s
Otonashi facing Angel on the bridge.
Image from Episode 2 - 22m53s
The bridge is also shown in the ED. It's not exactly the same though.
This location was visited on 2016/10/11.
University official website
Special thanks to the ones who went here before: