The key building is Evans Hall, a large, brutalist croncrete thing that is slated to be
demolished & replaced for earthquake concerns.
https://en.wikipedia.org/wiki/Evans_Hall_(UC_Berkeley)
CSRG's offices & machine room (including ARPANET IMP #78 when that was delivered;
before that, ARPANET was connected to the Ingres PDP-11/45 (or 11/70?) in Cory Hall) was
on the 4th floor, east side - windowed offices had a view to the Hearst Mining Circle and
the Molecular Biology buildin - windowed offices had a view to the Hearst Mining Circle
and the Molecular Biology building.
The CS department (College of Letters & Science) offices were on the 5th floor.
The main campus computer center was in the basement, but they charged by the CPU/second,
so only classes used those systems - in my day (1980-1983), the computer center had a CDC
6400 and six or seven DEC PDP-11/70s. BerkNet (RS-232c long haul lines) connected the
PDP-11s, and later the VAXen, though Ethernet supplanted it.
https://en.wikipedia.org/wiki/Berknet
The other building of note is Cory Hall - that's where the EECS (College of
Engineering) was headquartered, and the Cory Hall DEC PDP-11/70 was in a couple of rooms
on the south side of the west entrance, with an additional terminal room just opposite on
the north side.
https://eecs.berkeley.edu/about/visiting/
I believe all of CS has since moved into Soda Hall on the other side of Hearst Avenue,
which is built atop the site of UCB's former (decommissioned) nuclear reactor.
https://en.wikipedia.org/wiki/TRIGA
The neighborhood has changed, but it looks like La Val's Pizza is still there on
Euclid Avenue - one of the favored student hangouts in those days. The Top Dog sausage
restaurant has closed its Hearst Avenue branch, but the location on Durant Avenue
(southside of campus) is still there for additional local flavor. There were (and probably
still are) many fine restaurants along Shattuck Avenue in downtown Berkeley and points
north.
I also recommend the commanding view westward of the San Franciso Bay from the Lawrence
Hall of Science (LHS) -
https://lawrencehallofscience.org/visitors/directions-parking/
which was also used as the exterior of an AI computer control center for a dystopian
movie:
https://en.wikipedia.org/wiki/Colossus:_The_Forbin_Project
Some of that view could also be had in the 10th floor (west side) UCB Mathematics grad
student lounge in Evans Hall, but I think that's no longer accessible.
Erik Fair