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

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

Art deco landmark on the outskirts of Washington, D.C.

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

Nikola Tesla's former home contains an homage hidden from plain sight.

A grand New York post office that is home to mailman Santas, scraps of postal history, and a pneumatic mail system.

This 400-year-old tree is actually an immigrant from North America.

A glimpse of the Pacific Northwest‘s indigenous culture in Washington, D.C.

Sip creative cocktails in the former vault of the Riggs Bank.

A pink sandstone column once used in ancient times to measure one's belly after a night of debauchery.

This 14th century wine cellar is home to the oldest barrel-stored wine in the world.

The castle was reconstructed to fit Kaiser Wilhelm II's romanticized vision of the Middle Ages.

Explore this medieval cathedral by trying to spot all the malevolent monsters hiding in its beautifully colored windows.

There has been an astronomical clock on this spot since the 14th century.

Visitors dating back to the 1600s carved their marks in the stones of the iconic tower.

A beautiful Victorian statue shows France's enduring love of the rhinoceros.

Stripes of human ashes cover a back lawn in the most sought-after burial grounds in Paris.

France's most famous cemetery, with some of its most curious tombs.

Indents in the pavement are all that remain from a grisly death machine in Paris.

Site of a classic 19th-century physics experiment to prove the earth is rotating.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

Museum on French naval history, with magnificent figureheads, a historic diving suit, and a boat used by Napoleon.