A bright little alley in La Boca is a part of tango history.

The inspiration for the Patagonia Clothing logo, Cerro Fitz Roy turns pink at sunrise.

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.

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

This stunning mass of ice spans 121 square miles and is still growing.

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

This peculiar lake of pitch is so thick and viscous that one can walk on its surface.

This "floating island" plateau sits 7,671 feet above the forest floor.

Russian Orthodox church built on an Antarctic island.

One of the world's southernmost bars.

These homes carved into the mountains seem to defy the laws of nature.

The central mosque of this Mali town is entirely built from mud.

Africa's Venice on stilts.

The Voodoo Superstore of the world.

The world's largest church atop a political fault line.

This fortified sand barrier dividing a contested territory is the longest minefield in the world.

The world's largest ship graveyard is the product of decades of corruption.

Vast stretch of tide-pools with a unique Moroccan charm.

An awe-inspiring mosque in Morocco with one of the tallest minarets in the world.

Traditional 11th-century outdoor tannery.

God's Saharan sandbox of wrath.

Thousands of narrow alleyways in an ancient medieval city make up what's believed to be the world's largest car-free urban zone.

The other side is actually green.

A fortified city, home to a remaining population of five families