Towns with a resource known as "white gold," valuable enough to fight a war over, now stand ghostly and empty.

This red lake 4,000 meters above sea level is home to rare flamingos.

A seemingly endless landscape of pure salt stretches far across Bolivia.

On the outskirts of a desert trading village high on the Andean plain, steel giants have been destroyed by salt winds.

Mountain of unimaginable riches that bankrolled the Spanish Empire, complete with its own underworld god.

Thousands of volcanic rocks carved 1,000 years ago.

Popular tourist destination where witches in dark hats sell dried llama fetuses for good luck.

A series of waterfalls so massive they straddle the border of Argentina and Brazil.

The modern birthplace of Irish freedom.

The ancient tomb acts as a calendar that keeps perfect time.

This beautifully deceptive waterfall is something far different from what it appears to be.

Central America's deepest lake is actually a volcanic caldera, surrounded by three volcanoes.

A tree-like building perches on its trunk in the Steglitz neighborhood of Berlin.

An abandoned NSA listening post on Berlin's "Devil's Mountain."

Berlin's old airport.

An eerie, derelict amusement park in Berlin.

Cold war icon and onetime "hole" in the iron curtain.

Started as a kitchen garden, now the second largest botanical garden in the world.

An abandoned saucer-shaped monument in the Bulgarian mountains.