The legendary building that needed ghostly approval before being built.

Most famous work of one of Frank Lloyd Wright's sons.

This collection of neon icons is preserving Arizona's history, one sign at a time.

This sanguine boulevard was named after a deadly cowboy bar fight.

A mysterious spirit totem at the edge of Navajo lands.

The fading, forgotten remains of a once bright and booming factory.

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

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

All of the 20 occupied houses in this mostly abandoned town feature some curious display of junk art.

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

On the outskirts of a reborn ghost town, a decaying post office remembers the bad old days.

One of the largest, oldest, darkest, quietest motel rooms in the world.

America's only nuclear missile silo open to the public.

An arsenic-filled pool in the Grand Canyon takes on the appearance of a giant, overflowing pumpkin.

A reproduction of earth's many biomes.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

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.

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

Rippling sand dunes frozen in the Arizona rock.

These morbid carvings remind churchgoers of the inevitability of death.

This hidden green space is the city's second largest conservatory.

The final resting place to 300 Victorian-era pets hides inside the city park.

The remains of Crystal Palace Great Exhibition of 1851.