This 40-room dwelling tucked within a cliff was built by the basin's prehistoric residents.

An urban laboratory.

A nature and cultural preserve named for its multitude of petroglyphs carved by the Northern Sinagua people.

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

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

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

Thousands of Mexican Free-Tailed Bats soar around an abandoned storm drain at sunset each summer.

A working cattle ranch with remarkably well-preserved prehistoric petroglyphs and ancient ruins.

Limestone caves with spectacular showcase chambers.

In this small Phoenix taxidermy emporium, you can find everything from a squid in a jar to a freeze-dried toad.

On the outskirts of a reborn ghost town, a decaying post office remembers the bad old days.

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

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

The story of Two Guns, Arizona could easily be described as a Shakespearian tragedy on Route 66.

Open since 1938, this diner has kept its fountain, malt machine, and all the gum that greasers left beneath its counter.

This striking public art installation is suspended above a public park, designed to gently move in the breeze.

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

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

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

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

The Magical World of George Phar Legler.

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

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.