What looks like a crashed Zeppelin is actually a bright, airy reading room perched atop a modern museum.

A steampunk-styled three-floor factory churning out art, activism, and electronic beats.

One of the oldest, well-preserved water treatment facilities in all of Europe.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

Built on the remains of one the Incas’ most important gathering spots, this square keeps the spirit of a fallen empire alive.

A small, emotionally charged room inside the Mario Testino Museum dedicated to Princess Diana and one famous photo shoot.

Situated on a sacred Inca site, this 16th-century cathedral took nearly 100 years to build.

This geometric feat is a testament to the Incas' mesmerizing architectural abilities.

The mysterious "Candelabra of the Andes" could represent anything from a god's trident to a hallucinogenic plant.

A backdoor to Machu Picchu that only the most foolhardy infiltrator would attempt to breach.

This Peruvian canyon is filled with geometric salt pools that have been being harvested since the Incan empire.

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

An unexpected desert oasis in South America.

Huge stone depressions which may have acted as an Incan agricultural experiment.

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

Legend says if this neo-Gothic basilica is ever officially completed, the world will come to an end.

Quito's historic, main square dates back to the 16th century.

It took 160 years to complete the most ornate church in Ecuador.

An elaborate shrine dedicated to the four corners of the world unfortunately misses its mark.

A turquoise lake within a volcanic crater.

A swing to dangle you off the very edge.

Every Sunday, Bogotá turns 75 miles of its city streets into a bicycle superhighway.