Thousands of coffin-like pillars make up this controversial Holocaust memorial.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Macabre astrological automaton clock dating to the late 1400s.

The “Thumb” of Mauritius provides a 360 degree view of the entire country.

The highest dunes in California are the most likely place in the area to hear the Singing Sands.

"Only the devil could play golf here."

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

An abandoned Jazz Age dream home and con man's hideout in Death Valley.

This crumbling Death Valley mining complex was known for its use of giant, 20-mule team wagons.

A brothel nestled amongst ghost towns, with an abandoned plane wreck to greet you.

Odd outsider art installations surround a Gold Rush-era ghost town.

A land of debatable treasure.

The most famous location in China was home to whole dynasties worth of imperial rulers.

This black church sits alone among a field of lava rock.

Medicinal spa created with the discharge from a geothermal energy plant.

An encyclopedic collection of mammal penises.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

From the Difference Engine to the Cray-1, all under one roof.

César Baldaccini's iconic sculpture of a 40-foot thumb stands tall in La Défense.

The world's largest boar is a huge steel titan found at a French rest stop.

This small group of sand dunes manages to pack in a strange rainbow of colors.