A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

These pretty kitties killed and ate as many as 135 railway workers.

Largest man-made excavation on earth!

This giant temperature attraction created some giant electric bills.

A tree bears footwear on the loneliest road in America.

A massive volcanic plug is now a protected area that hosts a number of bird species.

An alley covered with 20 years of bubble gum.

Pilgrimage site for star-crossed lovers.

The fairy tale castle of the "fairy-tale king."

The first declared National Monument in the United States.

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

A fitting attraction for the corn capital of the world.

A beautiful geyser under environmental threat.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

"Only the devil could play golf here."

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

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

At 207 feet, one of the world's longest continuous escalators.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

Where commuters walk through remnants of an ancient Greek necropolis.

Giant marble phalluses on the sacred island of antiquity.