These ruined Incan mausoleum towers still bear carvings of sacred animals on their blocks.

It took 82 years and four different plaques to finally get the story right.

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

An Inca spa, military outpost or maybe… both?

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.

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

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

If you’ve ever seen a picture of Machu Picchu, then you’ve seen a picture of Huayna Picchu—you just didn’t realize it.

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

The corpse bride of Portugal.

Portugal's National Pantheon has a history of curses, collapses and financial problems.

A hidden three-foot-wide house separates these two regal churches.

An early work of the architect Álvaro Siza Vieira, these swimming pools blend into the beach.

Picturesque intersection of witchcraft and ancient Christianity.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

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.

Originally used to sell brandy, the bull-shaped billboard became an iconic symbol of Spain.

An elaborately decorated house sits on an otherwise quiet street.

This colorful statue welcomes visitors to a Barcelona park.

Rare karst landscape eroded from a flat seabed.

Volcanic rocks ground down into sand make this Spanish beach as black as night.

Mountain where Jesus was first tempted by the Devil.