Thousands of flowers create enchanting pink tunnels over the city streets.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

An elegant chandelier hangs over this ancient sewer chamber, now open for concerts and public tours.

A church filled with the bones of hundreds of virgins martyrs—or so they say.

A poignant mural honors the heroic teenage non-conformists who took on the Nazis and paid the ultimate price.

Residing along a busy thoroughfare, this sculpture urges passersby to consider the future.

The body of at least one victim of a construction accident was left behind in the collapsed pylon, buried under tons of concrete.

This historical Netherlands fortress still bears the marks of its single siege.

A luxury hotel housed in a former 15th century Gothic church.

Incredible labyrinth of man made caves.

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

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

This German fountain of a legendary apple wine-loving drink thief will spit on you.

This unique exhibit "Dialogue in the Dark" reverses roles as the visionless become guides and the sighted become ‘blind.’

From Nazi chemicals to the CIA, this architectural marvel has played a fascinating role in German history.

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

The "feral child" who appeared in Bavaria in the 19th century remains as much a mystery as his unsolved murder.

A bus with a butt and biceps to put Olympic athletes to shame.

A steampunk-styled three-floor factory churning out art, activism, and electronic beats.

Straight out of a nightmare, barcode-faced babies climb up and down Prague's television tower.

This artificial cave looks like something out of a fairytale.

A controversial artwork draws attention to the dark history of Prague's "Suicide Bridge."

A giant interactive periodic table with real samples of the elements.

A collection of anatomical samples from one of the first anthropologists to suggest that humans reached North America by crossing the Bering Strait.