Arizona may be the only U.S. state whose highway magazine is bought for its photography by non-residents. The Grand Canyon lies far to the north, but Southern Arizona contains its own unique wonders. Here are a few, loosely categorized. Most could appear under more than one heading - for instance, Tubac is of historical as well as artistic interest and Bisbee's Copper Queen mine is a vast monument to the transforming power of technology.

Technology

Kitt Peak National Observatory

Biosphere 2

The Pima Air and Space Museum

Titan Missile Museum