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

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

The cinder cone volcano with a less than complimentary name.

A living snapshot of a different time in America is preserved and maintained by a community of volunteers.

Hidden inside this Arizona fast food franchise is an in-depth exhibit on the famed WWII counterintelligence program.

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

A pair of giant roadside arrows are all that remains of a former Route 66 trading post.

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

This public square capitalized on a single Eagles reference to bring some life back to an Arizona town.

The highest point in Arizona is an oddly snow-topped peak within the otherwise arid state.

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

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

The world's largest military aircraft cemetery.

See massive fossils that are over 200 million years old in northeastern Arizona.

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

Dramatic river bend surrounds a natural red-rocked pedestal.

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

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

If you’ve ever seen a picture of Machu Picchu, then you’ve seen a picture of Huayna Picchu—you just didn’t realize it.

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.

Huge stone depressions which may have acted as an Incan agricultural experiment.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

These steeply terraced ruins are a stop along the Inca Trail to Machu Picchu.

The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.