A Tucson museum and performance space full of found-object movable sculptures.

A natural history wunderkammer in the middle of the desert.

One of the world's largest telescopes, stares into the night sky with two huge mirrors.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

A reproduction of earth's many biomes.

Rippling sand dunes frozen in the Arizona rock.

Natural catch-basin rocks covered in thousands of drawings spanning many millennia.

The Grand Canyon of Texas.

The tree is thought to be the oldest oak in Texas and was once crowned state champion for its monumental size.

The highest point in Texas is capped by a big silver pyramid.

A view-altering observatory at the University of Texas.

Steep canyon walls hide a forested oasis in the West Texas desert.