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

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

Open since 1938, this diner has kept its fountain, malt machine, and all the gum that greasers left beneath its counter.

A working cattle ranch with remarkably well-preserved prehistoric petroglyphs and ancient ruins.

Witnessing the might of this dessert-colored desert waterfall is a rare, powerful treat.

The fading, forgotten remains of a once bright and booming factory.

The artist James Turrell is repurposing an extinct volcano crater as an observatory to experience the cosmos.

Eons ago, a rushing lava river formed this pristine passage through solid rock.

Most-visited and most-photographed slot canyon in the American Southwest.

Dramatic river bend surrounds a natural red-rocked pedestal.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.