A secret fresh water spring for animals and humans alike hidden along the most famous road in the United States.

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

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

One of the largest open-pit copper mining operations in the entire country.

A natural history wunderkammer in the middle of the desert.

The cinder cone volcano with a less than complimentary name.

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

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

An Arizona museum with a collection of pharmaceutical oddities, including a jar of a gangster's chewed gum.

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

One of the world's largest telescopes, stares into the night sky with two huge mirrors.

This southwestern historic site was designed and built by an artist who wanted his work to "feel at home."

An artificial crater field that trained astronauts for lunar exploration.

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

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

This historic national park is covered in the stunning ruins of red rock pueblos.

Ancestral Puebloan ruins, natural arches, and box canyons abound in this seldom-visited corner of Monument Valley Navajo Tribal Park.

An urban laboratory.

The artist James Turrell is repurposing an extinct volcano crater as an observatory to experience the cosmos.

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

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

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

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

Outsider Art Community.