An unfinished tomb carved into a giant boulder in the Arabian Desert.

Brawny guys rolling around in oil is the oldest regular sporting event besides the Olympics.

A forgotten remnant of the Soviet Union, Transnistria is an unrecognized country hidden behind a heavily militarized border between Moldova and Ukraine.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

This unique exhibit "Dialogue in the Dark" reverses roles as the visionless become guides and the sighted become ‘blind.’

Tens of thousands of rocks make up what is thought to be a giant star calendar.

A cemetery with goat-horn bedecked gravestones.

A giant bisected onion dome remembers the Iraqis who died in the Iran-Iraq War.

The second-deepest known cave on Earth, hidden in an extremely remote mountain region.

The second largest in the world, this massive underground void has its own subway.

Ruins of a former government building destroyed during the Georgian-Abkhaz war in the wake of the fall of the Soviet Union.

Luxury hotel turned into a refugee camp, then turned back into a luxury hotel.

Complete town of 5,000 living out at sea on the world's first offshore oil platform.

In oil-rich Azerbaijan, people bathe in the black stuff.

Jurassic theme park in the small town of Erlian.

The giant Siberian crater known locally as the "doorway to the underworld" is expanding every year.

The world's second-largest excavated hole.

A former French military respite turned jungle tourism hotspot.

Have fun at the world's first Buddhist waterslide park.

A Surreal flight of architectural fancy in Vietnam's Central Highlands.

This bridge is embedded with a giant steel dragon that breathes fire from its mouth.

Beijing's version of Disneyland, completely abandoned, mostly destroyed.

The world's longest outdoor escalator takes visitors to the top of China's largest dam and is also shaped like a dragon.

A huge communist-era propaganda monument and mural that offers stunning views of the Mongolian capital.