Futuristic apartment blocks are the backdrop for Montreal surfers hangin' ten on the Habitat '67 standing wave.

A wall of chewing gum moonlights as collective art.

A walk through the historic city center, under the streets of Seattle.

This long, dark tunnel is open to hikers, but those without lights are known to get confused even on the straight path.

One small town in the Pacific Northwest transformed itself into a Bavarian-themed tourist destination.

The second-largest gold nugget in existence, displayed in a Las Vegas casino conveniently named the Golden Nugget.

Oddly shaped rock formation, misassociated with a nearby utopian community.

This raised bulls-eye visible from space was the subject of an intense geologic controversy.

Natural sonic phenomenon comes with a grisly legend of murder and blood.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Natural catch-basin rocks covered in thousands of drawings spanning many millennia.

"I did this all while you were watching TV."

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

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

A Wild West jailhouse that slid down the mountainside.

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

In the remote high desert of New Mexico, a strange array of poles beckon fury from above.

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

A reproduction of earth's many biomes.

This giant steer-skull edifice refuses to die.

The world's largest military aircraft cemetery.

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

Limestone caves with spectacular showcase chambers.

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