As I may have mentioned at least (?!?) once, one of the things that makes the Southwest so attractive to me is all that space. Gazing into the night sky is awe-inspiring, yet with the naked eye, one really can't judge how far out there it all goes.
But in the deserts, the distances may not be infinite, but the views are somehow more manageable to us human beans. On a clear day, one can see many, many miles/kilometers until the earth fades into the sky.
I've attached a picture I took on a trip to Canyonlands National Park in 2007. The rock at the top is Mesa Arch, and the view through this "window" is amazing. Even in the relatively flat noon-ish lighting, this scene is spectacular -- and not because I'm some fantastic photographer. The landscape is what it is.
Some day I'll paint this and feature it here and on my Website (which, of course, is http://www.southwestspaces.com/). It'll be yet another example of "The Vast Spaces of the Southwest."