According to local legend, the devil shattered this column after losing a bet.

The largest and best-preserved rotunda in Prague.

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

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

An existential riddle in the world's largest ancient castle.

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

A surreal statue honoring Prague's favorite literary son.

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

Bullet holes in the church wall are a reminder of the violence that followed the assassination of a high-ranking Nazi officer.

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

England's “third-oldest college” has not graduated a single student in over 400 years.

London’s first road overpass is so old that it was originally built for horse-drawn carriages.

London's amazing modernist public square that never was.

This statue of one of the engineers who created the London Underground hides a ventilation shaft for the tube lines that run under the street.

The last four extravagant street signs of London's historic banking street.

The location Geoffrey Chaucer and tale-telling pilgrims set off for Canterbury in April 1386.

The site of London’s first coffee house has been serving refreshments of one kind or another for 360 years.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the first ‘Harry Potter’ film.

These Victorian era devil sculptures were designed to spite a local vicar.

Hidden behind a wall for decades, this masonic lodge was only rediscovered during renovations.

This 19th-century Turkish bath house survived the Blitz of London and is now an events venue.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

This Underground station has been a popular filming location for decades, even before it closed.

Victorian-era Londoners really wanted to believe this 17th-century cistern was actually an ancient artifact.