Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

Ring the bell to enter a bar that looks equal parts museum and old curiosity shop.

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.

Walk or bike along a narrow strip of Belgium sandwiched by German territory.

Two gravestones clasp hands over the religious divide.

An early 20th-century sanatorium, long abandoned and now being reclaimed by nature.

This is what trains will look like after the zombie apocalypse.

This small commune with an even smaller name appears to have an unlikely amount of dead ancestors.

A little sculpture with a large wardrobe.

Sculpture designed by Turkish artist and professor Mehmet Ali Uysal.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

This tri-part waterfall is a little bit of fairytale beauty in the heart of Luxembourg's Little Switzerland.

This striking fort on the Maginot Line looks just as it did after being destroyed in the Fall of France.

A museum on the history of Paris, including a set of Napoleon's toiletries, Proust's room, and relics of the Revolution.

Five candy-colored villages on the Italian Riviera.

This statue once earned the distinction as one of the "Three Major Disappointments of the World."

This $62 million dollar temple was erected to house one little dental fragment of religious history.

Singapore's landscaping project is home to 18 incredible Supertrees.

The world's longest outdoor covered escalator system transports commuters through Hong Kong's hilly terrain.

This hulking behemoth is actually five interconnected towers built in the 1960s.

Stare out over the lagoon and beyond from this 10th-century campanile on the island where the city of Venice began.

The small peaceful island off the Venice tourist circuit is where the city began more than 1,500 years ago.