Museum housed in underground tunnels that date back to Buenos Aires's earliest settlements.

A toxic lake near a volcanic caldera that is home to flamingos and other life.

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.

Stenciled handprints and wall paintings dating back 10,000 years, some of the earliest forms of cave art.

Xul Solar was an artist of alternate worlds, inventor of languages, and dreamer of utopias.

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

This historic, palatial theater is now one of the world’s most beautiful bookstores.

The abstract sandstone rock formations at this Algerian national park are rich with prehistoric art.

An extraordinary mix of Phoenician, Roman, early Christian, and Byzantine ruins beautifully set overlooking the Mediterranean.

Once the fallout shelter of a dictator, this sprawling bunker is now a combined history museum and contemporary art gallery.

What happens when you cross a mayor and a painter?

A medieval bridge stretches over a sulfur-rich river that leads to year-round natural hot springs.

A naturally beautiful, seemingly bottomless deep blue spring.

A strip of neutral ground where the people of Tajikistan and Afghanistan come together to trade.

Museum dedicated to overthrowing the Soviets, complete with diorama of Soviets being beaten to death with shovels.

Splashes of blue in an otherwise monotonous lunar landscape.

This magnificent blue mosque in Afghanistan is surrounded by thousands of white doves.

An unrealized Taoist palace left abandoned in a Houston suburb.

This historical air terminal in Houston is slowly becoming an aviation museum dedicated to the city's aeronautical history.

At the "Garage Mahal" in Houston, car culture is about more than just driving.

There is an unmarked red button hidden over Houston's Buffalo Bayou that is just begging to pushed...

A private collection of massive steel monsters guarding a Texas pipe works.

A chance to sleep among the firs and pines of the Oregon forest.