Deathclaw Sanctuary

Deathclaw Sanctuary: Located in the Northwestern region of the map, South - South-West of Fort Constantine, between Dickerson Tabernacle Chapel and Broadcast Tower KB5.

Tips

 * If you're not a fan of them jumping at you, make a dart gun to cripple their legs
 * Fortunately, the tunnels are ideally suited for stealth play, allowing patient explorers to retrieve Vengeance without engaging any of the Deathclaws. Alternatively, most (all?) of the Deathclaws follow paths through some of the narrow tunnels, so it's also an excellent place to combine stealth with mines. You can find a good two dozen Frag Mines on the bodies scattered around (the exact number may be somewhat random), but bring your own Bottlecap Mines for quicker results.
 * The combination of sneaking around the cave while using the Alien Blaster usually results in one hit kills on the Deathclaws.
 * If you're having a hard time seeing in the darkness, adjust your brightness. This will let you clearly see everything, and won't give away your position like the Pip-Boy flashlight does.
 * When engaging or alerting a Deathclaw it's best to put your back to the wall and fight, this serves a dual purpose, it keeps the player from backing into additional Deathclaws, and it's safer (attacks from behind are part of Deathclaw A.I.).
 * If you have found Dogmeat already, be sure to go to My Megaton House and tell him to wait whenever you are going to a Deathclaw infested location (such as the Deathclaw Sanctuary or Old Olney) as they will generally attack him first due to his up close fighting and with his low health he can be easily killed.

Loot

 * There is a locked footlocker right outside the cave entrance which contains various guns, ammunition, stimpacks, and a Duck and Cover! book. There is likely to be a Deathclaw outside the entrance, too.
 * Bobblehead: Endurance directly south of the entry inside the cave, in the first large chamber - on a short pedestal near a pile of corpses and a Rotting Brahmin. (It is to the immediate left at the bottom of the entry slope, ground level) Also in the first chamber:
 * A Mini Nuke
 * A Nuka Cola Quantum - East side of the chamber, on the ground; look for the glow.
 * A Nikola Tesla and You
 * Vengeance in the far southeast of the caves
 * Jack (Depends on main quest timeline)
 * A fairly rare Roving Trader Hat (+5 to Barter) among the second pile of bodies in the second large chamber in the cavern, east of the entry, straight through a T-junction corridor.
 * There's an Enclave soldier that randomly spawns in the cave wearing Tesla Armor, if you haven't cleared the sanctuary beforehand this solider may be found dead (preyed upon by Deathclaws).
 * There are about seven heaps of corpses and body parts scattered through the cave. Each heap has 2-3 lootable corpses. A couple of the corpses are traveling merchants who have the Trader Hat and Outfit, about 200 caps, and a fair amount of other mediocre stuff.

Bugs

 * Upon entry of the Deathclaw Sanctuary there can be a brief moment of slow performance.