Fallout 3 locations project
This is a cave complex reached through a sewer grate south of the reflecting pool in The Mall. In many places there are radioactive streams of water leaking down. Originally home to a small number of humans who hid here seeking refuge, they apparently perished from the radiation or the Giant Ants and Mirelurks that chose to make it their nesting place.
A little ways after you start out, you will meet a fork in the road. Both tracks will converge later on, the right path eventually dropping into the left path from above. Following the path will lead to a circular chamber used by the Mirelurks as a nesting site protected by a high level Mirelurk (a Hunter, King, or both).
- Chinese Army: Special Ops Training Manual in a cave northwest of the main southern chamber. There is also an assault rifle with some ammo and a sledgehammer. (A) (The circuitous route to this location starts by scaling some rocks north of a dead raider. If you find a Brahmin corpse and another dead raider at the top, you're headed in the right direction.)
- Nuka Cola Quantum: Southwestern chamber (the one with the high level Mirelurk), crammed up in the corner (climb the rubble pile, as close to the west wall as possible), next to a Ham Radio. (B) Look high for the glow.
- Rad-X, Buffout and Psycho just inside the entrance, in a crate to the right of the door as you enter.
- Laser Pistol on a high ledge between (A) and (B) on the map. Approach from the North and look for a dead Brahmin next to a hollow high up, then climb up to find a dead mercenary with the pistol. Also a good vantage point to take out the Mirelurk King, as it overlooks point (B) where it lives.