A wall of chewing gum moonlights as collective art.

A giant Troll lurks under one of Seattle's oldest bridges.

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

Officially named the "Loneliest Road in America," this barren stretch of Nevada road offers almost nothing but sky and open fields.

An eatery for UFO seekers on the Extraterrestrial Highway.

Experience a charming 1930's version of "infotainment."

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.

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

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

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

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

The world's largest military aircraft cemetery.

Limestone caves with spectacular showcase chambers.

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

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

A reproduction of earth's many biomes.

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

No one knows the meaning behind this giant sculpture of a nude woman with a fork riding a rooster in Havana.

A focal point of the Cuban government, this city square features one of the most iconic images in the country.

Unusual building appears to be haphazardly built from randomly piled bricks.

340-foot statue built to honour the Heroes of the Soviet Union.

A reconstructed medieval gateway that was the magnificent entrance to the capital city dating back to 1037.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.