A mysterious spirit totem at the edge of Navajo lands.

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

An old saloon in the West filled with history, and according to some, a few dozen ghosts.

The wreckage of a deadly bomber plane crash can still be found near an Arizona peak.

The biggest solar telescope in the world helps reveal the secrets of our sun.

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

A secret fresh water spring for animals and humans alike hidden along the most famous road in the United States.

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

Take a monster truck tour around an ostrich farm in the middle of the desert.

Stairs often replace streets on the steep slopes of this old mining town.

The eroded core of an ancient volcano is now accessible by a short hike.

From working out of his garage to the James Beard semifinals, one Tucson baker has kept his fan base—and his grains—local.

One of the largest open-pit copper mining operations in the entire country.

A scrap-metal sculpture recalls an infamous 19th-century camel.

Arizona's first government hub is a rustic cabin now preserved as part of a historical museum.

Run by members of the Tohono O'odham Nation, this community farm nurtures traditional desert cultivars.

A mass grave for victims of an airline disaster that led to much-needed safety improvements for commercial flights.

This oasis-like spring in the Sonoran Desert is home to unique, endangered species.

A mistaken marker makes an erroneous claim along the historic Old Divide Road.

Concrete crosses scattered across the Arizona scrubland which were used to align spy satellites.

The cinder cone volcano with a less than complimentary name.

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

A self-built castle made by a mysterious man.

This iconic 1958 tower welcomes air travelers to Tucson with neon-lit letters and architectural style.