The room located inbetween the two East central sewers doors contains several feral ghouls including a glowing one. You can find a worn key in the inventory of the glowing one. A terminal with access to Central sewers control is also located here.
The south-west room near the sealed sewers is inhabited by 5 Fiends.
The exit marked "Mojave Wasteland" is an exit to Camp McCarran. It is guarded by NCR troopers.
There are two dead prospectors in this location. One is in a room off to the left of the long north-south tunnel on the east side of the map. The other is near the center of the map where several tunnels intersect. Both contain random guns, ammunition, and food.