A strenuous, unofficial trail leads to spectacular views in one of America's most remote national monuments.

The historic “pink house on the hill” is an architectural gem that now serves as a center for water conservation.

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

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

For those going through a life transition, a place to leave behind a piece of your former self.

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

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

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

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.

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

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

What is the Thing?

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

The world's largest military aircraft cemetery.

The world's largest rose bush has literally outgrown the pioneer museum it was planted behind.

Founded by members of the Tohono O’odham Nation, this one-room joint's James Beard–winning fry bread is light as a cloud.

An urban laboratory.

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

A spiritual vortex among the red rocks in Sedona.

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

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

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

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