Bizarre lunar-like landscape with thousands of large stone "hoodoos."

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

One of the most extensive and well-preserved collections of dinosaur footprints in North America.

This old selenite mine is dotted with tiny crystals that make it shimmer like it's covered in glitter.

A partial tunnel blasted into a steep ridge is all that remains of a failed railway across Arizona.

Legend says train robbers stashed their gold within the depths of this unusual cave.

A Wild West jailhouse that slid down the mountainside.

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

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

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

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

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

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

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

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

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

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

Eons ago, a rushing lava river formed this pristine passage through solid rock.

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

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