The largest copper mine in Arizona, this enormous open pit emerges from the hills like an alien landscape.

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

Wee (and not so wee) footprints that insects and reptiles of the Paleozoic Era left behind.

The massive, incredibly rare instrument is over 11 feet tall with a range so deep it goes lower than humans can hear.

Thousands of Mexican Free-Tailed Bats soar around an abandoned storm drain at sunset each summer.

Two massive and unstable sinkholes are yearning to unite, and their consummation could be catastrophic.

Search for traces of the dinosaurs that roamed here more than 90 million years ago.

A Bhutanese temple gifted from the isolated Himalayan kingdom is now a surprising cultural gem located at the University of Texas at El Paso.

More than 21,000 images fill this overlooked gem of a prehistoric site.

The world's second-longest burning light bulb.

The man who wasn't there.

A modernist landscape of water and sci-fi concrete.

High in the Sacramento Mountains, a facility dedicated to studying the sun.