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.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

An extraordinary natural landscape of mountains, waterfalls, and rocky cliffs riddled with tunnels.

The European equivalent of the Hollywood Walk of Fame is slowly spreading over the entire city.

A large measuring stick marks the lowest point of a country that is partially under sea level.