A traditional U-Bahn station in Berlin gets a string of rather untraditional benches.

This classic restaurant features a gorgeous mirror-clad room.

This lake’s emerald green waters are a spectacular sight, but it’s not a great place for a swim.

A quirky bookstore hidden beneath a sea of whitewashed Greek villas.

A Bronze age settlement on the Greek island of Santorini might have been the inspiration for Plato's Atlantis.

A whimsical bridge uses saxophones to pay tribute to two great men and the European Union.

This Peruvian canyon is filled with geometric salt pools that have been being harvested since the Incan empire.

Mountain of unimaginable riches that bankrolled the Spanish Empire, complete with its own underworld god.

South Korea's largely symbolic, barely used gateway to the North.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

The enchanting archway is the only surviving portal into Dublin's lost medieval wall.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

The mummified heart of a saint lives on in this church—after a brief hiatus when it was stolen.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

Roughly 17 million letters to Santa have found their way to this Arctic Circle post office.

This irregularly shaped sea fortress has defended not one but three different sovereign states.

A subterranean house of worship carved right out of the bedrock.

Macabre astrological automaton clock dating to the late 1400s.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

A huge old mansion full of thousands of toys, each there to be used and played with.

A fantastical 13th-century fortification sandwiched by a modern hotel in central Brussels.

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

Every hour a secret compartment drops from this giant pocket watch, revealing a lovely surprise.

A colorful street named for the legendary Australian rock band.