At the top of the mountain, where the ham radio is situated, there is an entrance to the cave. It is very dark and recessed in the mountain, so you have to keep walking 'into' the dark until a prompt comes up asking you if you want to enter the cave.
Hope that gets you there! :)
Next to lake Vegas. In between vault 34 and 11
When you get a "liked" reputation, speak to the leader in Camp McArren.
She is in the fire station at camp searchlight. The door is locked and requires a key, you can get this key by killing all the prospectors in the camp searchlight storage which is located to the west of it.
You cannot reach that location until the last mission, the final battle for Hoover Dam. You will fight across the dam, to the Legate's camp.
There are several Sniper Rifles to find in Fallout New Vegas.One of the easiest to find is in a derelict building near Camp McCarran.But be careful the building is booby trapped.
Hammana yokuisha.
just wait until you get to the dead horses camp and go inside the cave and talk to the man with bandages on his face and you can trade and buy the 45 auto pistil
Auschwitz
about 300 miles
Just play through the game and some guy ill come up to you and say "Caesar had wished to see you in him camp. All crimes against the legion are now forgiven" or something like that... then you go to Caesar and do a bunch of quests for him... that's all
To me the most "Badass" Revolver in Fallout NV is the Ranger Sequoia. It can be found on NCR Veteran Rangers and Chief Hanlon at Camp Golf. (Note: NCR Veteran Rangers will not appeare until level 16 and only at places that NCR Rangers are.) Requirements/Info: Skill-Gun-75. Strength-6. Ammo: 45-70 Gov't.
The password for the camp half-blood site is 'newhero.'