Fallout 3/Zone 7 Southwest Territories

F. Scott Key Trail & Campground
Guarded by a deathclaw and contains the schematics for a deathclaw gauntlet.

Dunwich Building
A very creepy building which is necessary to the Black Heart of Black Hall Manor quest (if you have the ../Point Lookout/ add-on). The building is infested with feral ghouls, so it is best to go there early on to avoid confrontations with feral ghoul reavers (if you got the ../Broken Steel/ add-on). You will come across many diary entries from someone called Jaime. By listening to these, you'll learn how he came here looking for his father and slowly became a ghoul. Once you get to the virulent underchambers you have to drop straight down. Then go through a few tunnels and up the second staircase and you will find the melee weapons bobblehead. Go back the way you came and there is a door underneath the staircase. Go in it and eventually you will reach the obelisk necessary for completing the Black Heart of Black Hall Manor with a good conscience. You will also find Jaime here, however he is now evil and will attack you. Kill him and the rest of the ghouls.