The world's oldest bookshop still in operation.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

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

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

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

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

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

This stunning concert hall has become a symbol of Iceland's national recovery.

The largest whale museum in Europe allows visitors to walk among life-size giants.

Three columns of volcanic rock shoot out of the ocean.

This hobbit-y little hot spring may be the oldest spring used by humans in all of Iceland.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

The "dragon babies" of southeastern Europe.

A miniature train-ride through Slovenia's largest cave system.

This massive subterranean fissure is known as the "underground Grand Canyon."

This one-time health resort was used by aristocrats around the world.

A whimsical bridge adorned with decorative dragons.

A dreamlike medieval church dug into the tuff rock, with unusual carvings and possible traces of the Templar knights.

Enormous, fluffy dogs frolic around this museum dedicated to a legendary Saint Bernard.

Medieval irrigation channels built into the sides of mountains provided Valais with water for hundreds of years.

A map of Italy made entirely of trees.

What looks like a link in Gondor's early warning system is actually a centuries-old Italian fortress.