An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

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

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

Looming communist pillar with a Czech twist.

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

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

Macabre astrological automaton clock dating to the late 1400s.

The remains of the great moral philosopher reside in a university in London.

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

After nearly 60 years, there's still a bear at Paddington Station looking for help.

Mary Kelly was last seen here before she was murdered by Jack the Ripper.

Eighty million natural history specimens call this gargantuan museum home.

One part local history, 99 parts gruesome haunted house.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

The Liverpool street made famous by the Beatles is real.

A statue in the heart of Edinburgh honors a bear that served in the Polish military during World War II.

The final resting place of soldiers' loyal canine companions.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

360° views of the city plus five floors of optical illusions and hands-on science.

Be on the lookout for the symbolic insect all over the city.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

Locals spent years successfully fighting to save this beloved Brutalist behemoth from demolition.

80 years of the Battle of Peasholm on a small English lake.

The gloomy ruins that inspired Bram Stoker to bring Dracula to life.