A small car graveyard sits in the shadow of the famous Cadillac Ranch.

On stormy days debris from this unfinished and abandoned skyscraper rains down on the Bangkok streets.

This museum has a most unusual location: inside a giant, three-headed elephant.

Charnel house at the foot of Mount Sinai.

Historic medieval fortified city in southwest France.

Traditional 11th-century outdoor tannery.

Founded as a refugee camp, now a popular tourist spot.

The most loyal of little dogs, or a Victorian era publicity stunt?

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

The highest point in Texas is capped by a big silver pyramid.

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

The railroad tunnel nicknamed the "Bloody Pit" for taking the lives of hundreds during its construction.

Discovered by cows, these upstate New York show caves are presented with a healthy dose of psychedelic folk art.

Inspiring Herman Melville and Henry David Thoreau, Mount Greylock in western Massachusetts is the highest point in the state at 3,491 feet above sea level.

New fungal and bacterial species call this deadly lake home.

A small section of Boise, Idaho maintains the unique culture and traditions of the Basque people.

Home to the deepest rift anywhere on Earth.

The highest point in South Dakota contains the ashes of Valentine McGillycuudy, the "Holy White Man."

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

The first declared National Monument in the United States.

A popular rock that acted as a waymarker for American pioneers.

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

A small flooded ghost town with a few scattered structures remaining.

Portlandia is the second-largest copper repoussé statue in the United States.