I find your lack of faith disturbing.

Vault-Tec Regional HQ?

Nope.

Here is a hint (I hope it isn't too good of one): It is a shelter of some sort. But the shelter itself isn't a particular named area on the map. It may or may not be in a named area, however. If that makes sense.

*broods*

I think I know it! The bomb shelter in West Everett Estates! The left upper corner of the pic is the stairs going up.

Damn it, my hint was too good, lol. I was wondering if someone would think of the stairs.

The goes back to SubRosa!

I believe that is the Garden Terrace. Nasty little surprise the Deathclaw up there was.

That is it! The is right back at you.

Woohoo!

Let's go with a Skyrim screenshot this time. Where was Evelona?

Saarthal.

Aaaaaaaaand I figured it was too easy.

for Lopov!

Thanks.

Where did Dogmeat kill this deathclaw?

Old Olney in that underground area? Urgh, if I'm right I don't have a screenshot! That's why I didn't answer those two I knew the answers to before! Gaaaaaaah! Ignore my answer if I'm right,

That is under that hospital with the deathclaw arena in the basement. Kendall Hospital.

That's correct.

Interesting.

It can't be Roadside ruins, the forest behind it is thicker.

Maybe Windward ruins?

No on both.

A Dwemer ruin in Skyrim, final answer!

The steps leading up make me think it's Silent Moons.