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

Walk through the actual strap iron cells and solitary chambers of Arizona Territory’s first prison.

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

A Tucson museum and performance space full of found-object movable sculptures.

A cabinet of curious mathematical models and old calculators.

In Tucson a giant metal snake helps pedestrians cross a busy highway.

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

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

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

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

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

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

This reclusive Hopi village in Arizona has been continuously populated longer than anywhere else in America.

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

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

An homage to everyone's favorite prehistoric cartoon family.

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

A mysterious spirit totem at the edge of Navajo lands.

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

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

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

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

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

A museum and tribute to a brave profession.