The Sewer
The walls are damp and covered with slime. It smells of rotting meat. Rats scurry about in the darkness, carefully avoiding the light shining in from the manhole above. Eutrophic water is flowing down the tunnel, carrying bits of partially decomposed matter. Something is spray painted on the wall.
Exits:
up to Marin City
south to Bay Sewer Tunnel
east to East Tunnel