Also known as Uncle Karl, the beloved bronze copper keeps a watchful eye on St. Stephen’s Basilica while people rub his lucky belly.

Hungarian Jews were ghettoized during the Second World War, but little remains of the original wall that closed the Jewish people off from the rest of the city.

The cedar tree in Highgate Cemetery earned its title by accident.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

A centuries-old shrine where Indians pray for U.S. visas.

The rose garden in Regent's Park where Pongo and Perdita met for the first time in Disney's "101 Dalmatians."

London's smallest police station is barely the size of a phone booth.

The medieval woodcut-style artwork chronicles life in medieval London.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

Pop culture has helped to keep this iconic British building from being destroyed.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

This coffee shop lies hidden beneath a historic church.

A hands-off space for graffiti artists to hone and display their skills.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

These mechanical goats first battled it out in the year 1551, all because of an overcooked deer.

An impressive monument to Poland's independence.

Once a giant gingerbread factory, this space now hosts exhibits and workshops on the historic treat.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

Throughout this shopping mall are medieval ruins that were discovered during the mall's construction.

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

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

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