Now a hotel, this former bank was the site of a robbery that spawned a psychological phenomenon.

The library's graceful rotunda is like a bibliophile's temple.

It houses the remains of a 17th-century version of the Titanic.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

The former headquarters of history's oldest megacorporation.

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

This German art chapel is perfect for those who like their worship hard, modern, and utterly alien.

This unassuming stone bollard is a centuries-old marker denoting the center of the city.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

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

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

Two standing giants remain as a tribute to Luxembourg's metallurgical past.

Some believe that the artist behind this whimsical statue inserted his own likeness as a way to discreetly flip the bird.

This small chapel built into rock is the oldest place of worship in Luxembourg.

The official motto of Luxembourg reminds passersby of the Luxembourgish commitment to their national identity and sovereignty.

Healing waters from a holy well, previously used by locals for doing laundry.

Below the altar in Saint-Willibrord Basilica rests the mortal remains of Luxembourg's patron saint.

This memorial to the victims of the Romanian Revolution of 1989 is often compared to a potato on a skewer.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

This once-derelict building is now one of the most beautiful bookstores in the world.

A piece of the front end of a British cruiser that was used as a block ship in World War I.

This statue of a studious young woman stands at the site of Leuven's first college to accept female students.

A replica of a 17th-century map of the stars stands in the courtyard of a Belgian university.

Hidden along this old street in Antwerp is a surreal monument of a bronze arm sprouting four hands.