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.

A condensed piece of China floating in a Dutch harbor.

The Rozenberg wind wall in South Holland makes for smooth sailing through the Calandbrug canal.

A radio telescope for listening to the stars, based in one of the cloudiest countries in the world.

A huge teapot illuminates a home for the elderly.

The birthplace of most all of Europe's space missions is here on the Dutch coast.

This former hydraulic laboratory is now a woodland dotted with old engineering models.

A Netherlands hotel where you can sleep inside a wine barrel.

A hidden church in a hidden courtyard tells the story of the Miracle of Amsterdam.