I've seen this too and pictures of concentration camps that are already built. My son went out of town recently and seen a big, what he thought could have been a look out tower, veiwing all 4 directions. He seen this around Carlsbad New Mexico. He said it did not look like any kind of deer blind and that it gave him the creeps. I looked up concentration camps in this area and this is what I found:
White Sands Missile Range - Currently being used as a storage facility for United Nations vehicles and equipment. Observers have seen this material brought in on the Whitesands rail spur in Oro Grande New Mexico about thirty miles from the Texas, New Mexico Border.
I got it from this site:
http://www.mindfully.org/Reform/2004/FEMA-Concentration-Camps3sep04.htm

This is only 2 and 1/2 hours from here.