This hilltop park offers magnificent views and a Frank Lloyd Wright masterpiece.

The world’s largest concentrated solar plant generates as many problems as megawatts.

A stone pillar marking the location of the westernmost battle of the American Civil War only honors one side of the conflict.

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

Commercial aircraft storage facility, where you can see a TWA 747.

A Wild West jailhouse that slid down the mountainside.

An excursion train traverses a picturesque red-rock canyon along the Verde River.

The state's only comprehensive museum dedicated to the mineral that defined its history and economy.

Inside this store, a mysterious statue draws visitors from the world over.

The world's only teal arches exist in a city that cares more about its aesthetic than an Instagram influencer.

A spiritual vortex among the red rocks in Sedona.

Bootleggers ran booze beneath this building before (and after) Route 66 appeared beside it.

You don't have to be a diplomat to visit the so-called Camp David of the West.

This simple highway curve has become a comedic pilgrimage site.

A museum dedicated to the life and career of the gifted but controversial general.

A self-built castle made by a mysterious man.

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

A museum and tribute to a brave profession.

A historic hydroelectric power plant serves as the unusual backdrop for a public park.

A geological mystery on Camelback Mountain.

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

This striking church was built from a Frank Lloyd Wright design more than a decade after the master architect's death.

Giant jars and pots littered alongside an Arizona freeway

San Francisco's newly reopened hands-on science museum.