Red sandstone structures dominate this landscape, which has been inhabited for some 5,000 years.

This isolated outpost was once the only place to cross the Colorado River for hundreds of miles.

Some 10,000 works of ancient rock art cover these volcanic basalt outcrops near the Gila River.

This 24-acre park offers a place for meditation in the midst of Sedona's iconic red rocks.

Opinions differ as to whether this Arizona tree was actually used as a Wild West jail, but that hasn't stopped the town from capitalizing on it.

This remote desert watering hole has a connection to a curious chapter of American history.

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

These mid-century motels once housed the workers who built the Glen Canyon Dam.

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

The historic “pink house on the hill” is an architectural gem that now serves as a center for water conservation.

The cinder cone volcano with a less than complimentary name.

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.

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

A small canyon with petroglyphs and a seasonal waterfall, only a short hike from the remnants of old Route 66.

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

An urban laboratory.

An artificial crater field that trained astronauts for lunar exploration.

This 40-room dwelling tucked within a cliff was built by the basin's prehistoric residents.

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

This golf ball–shaped former desert real estate office now houses a UFO museum.

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

A spiritual vortex among the red rocks in Sedona.

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