This top secret Chinese military megaproject is the world’s largest human-made tunnel structure.

This Khmer temple is named after a young woman who sacrificed herself to protect the city from a disastrous deluge.

In the world's most bombed country relative to its size, this incredible organization helps pick up the pieces.

This mysterious tower is said to enshrine a dormant seven-headed serpent that once protected Vientiane from destruction.

When the USA donated cement and funds to expand the airport in Laos, the Laotians built a massive monument instead.

Hoax, mistake, or evidence of dinosaurs in human times?

Nearly three tons of weapons from the Vietnam War still remain in this small, hidden museum.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

The true jewel of Africa's west coast known as "Africa's Last Eden."

The world's first and only natural nuclear reactor.

The equator passes through this tiny island in the eastern Atlantic.

This nearly abandoned plantation was once witness to an eclipse that proved Einstein's theory of relativity.

Nature’s skyscraper launches out of the terrain with attitude.

Tracks of ceratosaurus and Coelophysis rhodesiensis tracks can be found fossilized in the sandstone near Mt. Etjo.

Bizarre living fossil only grows in a small chunk of the Namib Desert.

The largest known meteorite on Earth was too big to move.

Unexplained bald patches in the landscape grow and recede over time, as though they are somehow alive.

Hitch a boat ride to dine on stilts while watching wildlife.

This granite mountain is the largest rock in Africa and the second-largest monolith in the world.

This dais was said to be a remote toilet built for the convenience of the British Royal Party on their brief, and only, visit to this small African nation in 1947. But is the story true?

An aeronautical-themed resort forged around rusty relics from the golden age of air travel.

The burial ground of four Buganda monarchs was nearly destroyed by a devastating fire.

Six rock shelters covered in abstract art created by ancient Ugandan tribes.

A strangely forgotten claimant to the much contested title of "Source of the Nile."