In my sights.

Nothing survives. Ever.

Quarry Junction, Dead Wind Cavern, and Deathclaw Promonotory come to mind. Any place with an abundance of Deathclaws basically.

The area north of Goodspring Cemetery is also a literal deathtrap for low level players, and it's not surprising that MANY players go that route since it seems the obvious way to New Vegas. Cazadors, Giant Radscorpions, DEATHCLAWS. You're basically [censored] if you try to go north at a low level.