trinitysite out in middle of no where (Score 1)

That site is only open on 1st Saturday of April and 1st Saturday of October, if my memory serves me correctly. It's the first place where the atomic bomb testing was produced. Sunspot is quite an interesting observatory though I do not know if it's open to the public and it's located in Sunspot, NM. Space Museum of Alamogordo, New Mexico is another recommendation. The Meteor Crater out in Arizona. Lava field out of western part of Carizozo, NM. Gosh, I didn't realized that's a lot of places out in southern NM.