This demon atop the Notre-Dame de Paris looks utterly bored.

Eighty million natural history specimens call this gargantuan museum home.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

This museum documents the ancient practice of salt production in Figueira da Foz.

A deer-headed statue that brings together a 12th-century legend and big wave surfing.

The crumbling ruins of an abandoned 12th-century monastery.

An icon of the city, this chapel features an amazing dome ceiling and offers panoramic views.

This ship offers visitors the chance to spend the night aboard a former floating hospital for fishermen.

A glacial valley filled with silver beech trees in the mountains of Portugal.

This enigmatic Roman tower lurks just outside Belmonte.

The first mechanized factory in Spain is also one of the most significant mints in the history of money.

This magnificent castle grew from a small Moorish fortress, and reportedly inspired two iconic Disney castles.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

Panoramic views from the mountains over a facility built to provide tuberculosis patients with fresh mountain air.

This glass skywalk offers vertiginous views down the volcanic cliffs to the beach below.

One Portuguese poet described this cape, the westernmost point in mainland Europe, as "where the land ends and the sea begins."

These small, triangular, colorful houses are a staple of Madeira Island.

A fortress off the West coast of Portugal that dates back to 1502.

The extravagance of Portugal’s "Pink Palace" resulted in a noble title being awarded to its owner.

Nestled in the mountains of Portugal is a tiny village made almost entirely of schist.

This castle has links to Portugal’s founding and struggles for independence.

Europe's oldest still-operational tea farm also boasts a spectacular view.

This giant sculpture made of trash is a critique of society's wastefulness.