Originally conceived as part of a proposed Arizona State Capitol building in the 1950s, this structure built in 2004 stands as a monument to the architect's legacy.

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

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

A classic Route 66 landmark that was built with scrap lumber and is held together with kitsch and puns.

An urban laboratory.

This small interfaith chapel lies not far from the rim of the Grand Canyon.

Once the product of an inexplicable gold strike, this ghost town is now home to one man and his love of classic machines.

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

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

An homage to everyone's favorite prehistoric cartoon family.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

This sinkhole in the Arizona desert is filled with carbonated, arsenic-rich water

The largest and most well-preserved petroglyph site in the Verde Valley.

A spiritual vortex among the red rocks in Sedona.

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

Eons ago, a rushing lava river formed this pristine passage through solid rock.

One of the final grand railway depot hotel complexes is slowly being restored to its former glory.

Witnessing the might of this dessert-colored desert waterfall is a rare, powerful treat.

The remains of a large pueblo village constructed by the Salado culture, who occupied the region more than 600 years ago.

This site is home to ancient petroglyphs and pictographs dating back to 6,000 B.C.

Few things look more out of place than the electric blue ponds in the reddish-brown desert of Utah.

This balancing rock is one of Utah's most unusual geological formations.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

This Old West hotel, the longest in continuous operation in the state of Arizona, is claimed to be haunted.