The remains of a 1st-century aristocratic Roman town house featuring beautiful well-preserved mosaics.

The medieval home is still engraved with the symbol of the profession, an eye flanked by two axes.

This unique building in the main square stands out among the city's typically Baroque architecture.

A little sculpture with a large wardrobe.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

Dead weights honor the dead of Portugal's fishing industry.

A hidden three-foot-wide house separates these two regal churches.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

Architectureal fantasy quarter of Rome.

Catering to broken dolls for almost 200 years, this repair shop is now a charnel house of doll parts.

One of the smallest bookstores on the planet.

The best place in the world to buy tinned fish.

This statue honors the thousands of Allied avians that served and died for France during World War I.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

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

This chapel is the site of a yearly pilgrimage that originated during the Middle Ages.

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

A cluster of granite granaries perched on stilts.

A stunning 18th-century site where pilgrims ascend by a series of punishing stairs only to return via funicular.

France's highest manned weather station is the only one still inhabited by meteorologists.

The world's tallest bridge is also possibly the most elegant.

A stunning cemetery famous for its extraordinarily delicate & lifelike mourning sculptures.

These quaint French houses dangle precariously over a precipice.