There are two places in Needles where there are radioactive squares: down at the waste dump, and up in the northwest section around the temple. Watch out if it's daytime. Walk around the sand dunes in the southern part to raise Climb and Acrobat to 3. When you reach the crest of the...
↑Fallout: New Vegas Official Game Guidep. 423:"The building has the grammatically incorrect “Romanes Eunt Domus” (“Romanes’ they go to the house” instead of “Romans go home”) daubed on the side." (Tour of the Mojave Wasteland) ...