Twice a day a speeding train passes only inches from the homes of this residential neighborhood.

This striking otherworldly landscape outside Angola's capital city is the product of millions of years of erosion.

Held in a fort that once stood for colonization of the area, this museum now tells the history of its indigenous people.

This deceptively beautiful island was once home to a German concentration camp and known as "Death Island."

This "dead marsh" sits among the largest sand dunes in the world, a forest frozen in time.

The remains of diamond fever taken over by the desert.

A public display of prehistoric space rocks is named for the Namibian village where they were found.

Mount Nyiragongo has erupted at least 34 times since 1882 and is home to the world's largest lava lake.

One of the last refuges of the endangered eastern lowland gorilla.

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

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

This no man's land slicing through the island is strewn with abandoned relics of another time.

An island graveyard with spectacular views of the Caribbean.

Beach instrument turned bed and breakfast.

Underwater art project will double as a massive artificial coral reef to help regenerate the damaged ecosystem.

A small collection of iguana-infested ruins hides amid Cancún's bustling hotel zone.

Few of the many visitors to this resort town know of its hidden Maya ruins.

One of Mexico's least-visited archaeological sites is tucked away inside a theme park.

The ruins of an important pilgrimage destination for worshippers of a Maya fertility goddess.

An ancient system of freshwater caves filled with animal bones, including that of species long-extinct.

A flooded Mexican cave that hides a river beneath the water.

An homage to the medieval rulers of Bulgaria.

"Unity, Creativity, Beauty."

A mountain pass in Bulgaria's Balkan Mountains was the site of four historic battles.