One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

Ancient catacombs form the foundation for this Rococo orgy of a church.

Elaborate tile work in this railway station tells the story of Portugal.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

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

An exquisite collection of fairytale conveyances that puts most car museums to shame.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

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

Three bridges and one giant canyon make up this fantastic Spanish settlement.

Spain's stunning solar energy plant.

The world's largest wooden structure.

The final resting place of the great navigator, or maybe his brother.

A Spanish town built into the cliffs.

The world's most elegant power lines.

Single runway interrupted by a busy road that cuts across its middle.

Founded as a refugee camp, now a popular tourist spot.

Thousands of narrow alleyways in an ancient medieval city make up what's believed to be the world's largest car-free urban zone.

The other side is actually green.

An awe-inspiring mosque in Morocco with one of the tallest minarets in the world.

Numerous impressive carvings are embedded in the trees lining this street in Marrakech.

Morocco's largest Jewish cemetery.

A favorite with sightseers, this Norwegian funicular provides easy access to a stunning view of Bergen and its environs.

Longest road tunnel in the world features an air treatment plant and the illusion of daylight.

A serpentine highway twists and turns over the treacherous Norwegian Sea.