Monument Valley really gives you a sense of space. It's in the upper northeast corner of Arizona on the border with Utah - at least a 2 hour drive from anywhere.
When you arrive, the view is incredibly vast. A 180-degree panorama of massive buttes reaching up from the valley floor, it's almost endless. You have to just stop and enjoy the perspective.
The Mittens and Merrick Butte.
Big sky.
West Mitten, East Mitten, Merrick, and Elephant Buttes.
Boulders for perspective.
El Capitan.