The most loyal of little dogs, or a Victorian era publicity stunt?

The entrance to this Frankfurt subway station looks like an old tram car crashed into the concrete sidewalk.

Carved fountains poignantly placed in parks and in front of special monuments.

Perfume museum and library.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

The oldest and smallest cemetery in Paris is only open to the public twice a year.

The celebrated eyesore created by starry-eyed sweethearts.

This imposing 20th-century castle was abandoned before it was ever completed.

Communism's topsy-turvy effect on Poland has been brought to life in this wacky tourist trap.

The site of the first battle of World War II.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Where Venice's gondolas go for a tune-up.

Thousand-year-old Viking runes adorn an ancient Greek lion at the entrance to the Venetian Arsenal.

Large Hadron Collider and the Birthplace of World Wide Web.

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.

Climb inside an iron crystal magnified 165 billion times its normal size.

Europe's official "zero-level," the equator of elevation.

This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

Amsterdam's former hotspot for public executions and dissections.

This centuries-old gothic monster has been converted into a sprawling, glossy bookstore.

Old ships and machinery fill a historic harbor in the city that's home to Europe's largest port.

A dramatic art installation features a BMW flying out of a building in Rotterdam.

A statue of the second-tallest Dutchman in history.