The "Prussian Versailles" that is as glorious today as when it was built.

Largest illuminated advertisement sign in the world.

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

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

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

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

Increasingly decayed figures stand as a powerful reminder of the human costs of Czech Communism.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

What looks like a suicide in progress is actually a statue of Sigmund Freud.

The hidden lair of an alchemist rediscovered in a 2002 flood.

Two stunning 17th-century libraries and a cabinet of curiosities.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

Macabre astrological automaton clock dating to the late 1400s.

This artificial cave looks like something out of a fairytale.

The upstairs reading room is packed with millions of rare books, literary manuscripts, and historical treasures.

Turning night into day in Victorian-era Austin to thwart a serial killer.

Free public park and gardens filled with peacocks and peahens.

A store full of vintage and indie toys designed to bring out the kid in even the crustiest of adults.

DIY collection of eclectic holdings.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

Berlin's beloved bear is immortalized at the Museum für Naturkunde.

Tiny memorials honor individual victims of the Holocaust.

Metro station with a claim to rock n' roll fame.