Research station devoted to mysterious floating lights seen in a Norwegian valley.

At the very tippity-top of Europe is a cliff from which you can view the midnight sun.

One of the most breathtaking railways in Europe also takes one of the steepest climbs, from fjord to mountain plateau.

Macabre astrological automaton clock dating to the late 1400s.

This "preacher's pulpit" once used for pagan ritual, is home to a new, and dangerous ritual.

A stunning silver lining to global warming's gloomy cloud.

A black cat protests the City Guild in Riga's Old Town.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

Monasteries on rock pillars, once accessible only by frayed ropes.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

The curious underground history of keeping Paris clean.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

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

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

An abstract monument to a symphonic composer.

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

This dizzying tower was built to better broadcast the 1980 Moscow Olympics.

Hans Christian Andersen for the postmodern world.

The original home of the Lego has a huge amusement park dedicated to the iconic plastic toy.

Old Danish castle immortalized in Shakespeare's Hamlet.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

A 19th-century subterranean reservoir repurposed as a contemporary art cave.

Beneath Denmark's Højbro bridge, a bronze merman and his seven sons forever mourn for the mother and wife who left them for land.