No one knows who's responsible for decorating this tunnel with stuffed animals, but the people love it enough to protest their removal.

Stockholm's deepest subway station is also a stunning ecological wonder.

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

One man spent 10 years building a spectacular section of road because no one else would.

Monty Python fans will recognize this abandoned mine as the Cave of the Killer Rabbit of Caerbannog.

These ruins are a hidden gem, complete with fantastic views over the cliff edge.

A World War II torpedo launch station abandoned off the Polish coast.

The site of the first battle of World War II.

Memorial to the lost dead of Gdansk, whose resting places were destroyed during World War II.

A floundering Polish shipyard was once the soul of the Solidarity movement that capsized communism.

The only surviving piece of Copenhagen's 16th-century defensive wall.

Museum on earth sciences featuring a recreation of a famous curiosity cabinet.

Hans Christian Andersen for the postmodern world.

This sublime architectural marvel is a rare example of an expressionist church.

Copenhagen's celebrated theme park and gardens.

Unconventional site where the tracks of Zurich tramcars intersect.

This colossal couch is an unlikely monument to Europe's first female Doctor of Law.

This eclectic architectural gem played witness to Zurich’s colonial past.

An unusual vending machine designed to support mourners during funeral ceremonies at Zurich's largest cemetery.

See the rare bloom of the "Queen of the Night" cactus at one of the world's largest succulent collections.

One of a series of no-purpose kinetic artworks by Swiss sculptor Jean Tinguely.

This charming fountain honors Felix Salten, the creator of the iconic storybook deer.

One hundred years ago this small house in downtown Zürich became the birthplace of the Dada movement.

A small and surprising passageway in Saint Petersburg devoted to the Beatles.