Mysterious glowing orbs float through the desert night.

Limestone caves with spectacular showcase chambers.

The world's largest military aircraft cemetery.

A natural history wunderkammer in the middle of the desert.

The Magical World of George Phar Legler.

Religious statues built because of one man's bargain with God fill this peaceful sculpture garden.

This rustic cabin, outfitted with gun slits, was once home to John D. Tewksbury, patriarch of the bloodiest family feud in American history.

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

The burial grounds of a secret society includes fences topped with fake Tesla balls.

A museum dedicated to the alleged Roswell Incident.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

Once a year, at exactly 11:11 a.m., this monument comes to life.

Every Christmas, one Arizona city makes the most of its dry climate by creating an arid desert tannenbaum.

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

A geological mystery on Camelback Mountain.

A museum and tribute to a brave profession.

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

A mysterious "wedding cake" castle in the middle of the urban desert.

These free-roaming horses were once destined to disappear from the land.

A $100,000 tumbleweed decorates an Arizona park and ride that got its priorities a bit tangled.

After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.

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

This collection of Wild West movie memorabilia also claims to hold some secrets of the Lost Dutchman's mine.