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

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

A nature and cultural preserve named for its multitude of petroglyphs carved by the Northern Sinagua people.

An artificial crater field that trained astronauts for lunar exploration.

What is the Thing?

Collection of vintage trailers double as hotel rooms.

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

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

The largest natural travertine bridge in the world is nestled in a small canyon in central Arizona.

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

The world's largest rose bush has literally outgrown the pioneer museum it was planted behind.

In this small Phoenix taxidermy emporium, you can find everything from a squid in a jar to a freeze-dried toad.

Ancient pueblos built into the base of a natural canyon wall.

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

The Magical World of George Phar Legler.

This historic national park is covered in the stunning ruins of red rock pueblos.

Ancestral Puebloan ruins, natural arches, and box canyons abound in this seldom-visited corner of Monument Valley Navajo Tribal Park.

A stealthy Apache hideaway that became the haunting site of a mass grave.

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

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

Dramatic river bend surrounds a natural red-rocked pedestal.

Rippling sand dunes frozen in the Arizona rock.

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