Which Buildings Are Connected?

Some more info about the tunnels -

The UCSD utility tunnels are in 2 distinct sections. These are simple enough that they can actually be described pretty easily in words. (something which could not be said for many other colleges!) I figured a textual description would be interesting and useful to some.

• The first, older & smaller section is Revelle. These tunnels start at Anchorview (the old Physical Plant), connect to all of the mud huts (through tiny, unlit, dirty crawlspace tunnels exiting into the Laundry Rooms) , continue to Galbraith Hall (UGL), branch to York, branch to the current Physical Plant, continue on to Bonner, then they become basically "public", crossing under the Revelle walkway over to Urey. By "public", I mean you can see this section any time, as it is part of the Urey basement (the part with the huge pipes on the South side of the hall) The section of these tunnels after Galbraith is round, unlike most of UCSD's tunnels.

• The main section of the UCSD tunnels basically does a loop around the Eucalyptus grove/Sun God in the center of campus. It starts from the East side of the Physical Plant. After a short stretch it branches (at an outside vent which can be seen on Gilman Drive) into the loop. Going clockwise around the loop, the tunnel continues for a long, straight stretch, turning almost directly beneath the Grove Caffe. It turns towards the Gym, which is connected through a small branch. This is also the location of the most well known Tunnel entrance, the manhole on the hump (the one with "UCSD" on it, light can be seen through it at night). Just north of this corner is a branch to Mandeville. The tunnel continues and branches to the Biology building. (this entrance can be walked up to in the basement of Biology.. you can look in, but the door is heavily chained/alarmed) Continuing on, the tunnel splits at AP&M, which has a tunnel entrance in the basement. The branch here goes west to Muir, ending at McGill hall/the Rat. There is a vent here, right next to the stairs going beneath TOQ. Contnuing around the loop, the tunnel turns east at the Muir Booster Station, which is the loud set of fenced-in pipes next to Campus Loop Drive and Petersen Hall. The tunnel then heads towards Cog Sci, where there is a loud vent fan that can't be missed. It continues east under the walkway at a steep down-grade and passes another vent next to the library. Beneath the concrete area in front of the library there is a 3-way junction, with a manhole out (again, the one with UCSD on it.) The left branch leads into the library, apparently into the utility room inside the music listening library. The right branch goes south, almost prefectly straight, for the entire length of Library Walk, past a loud fan in the middle of Gilman Dr., and to the quad next to the Medical Library. Here is another manhole, and a branch left (East) over to the Basic Sciences Building. The tunnel continues south after this for a bit, then it angles back to the Physical Plant, meeting the beginning of the loop along the way.
• There is also a "Miscellaneous" tunnel, unconnected to any others, which crosses underneath the "ridge walk"-from the bottom floor of Cog Sci over to Chemical Research.

Source : Ben-Net (Ben Hines) - http://members.tripod.com/~tunnels/ucsdtunn.html