The signs of a long buried road can still be found hidden beneath a London sewer grate.

On a wall in linear London, a plaque hangs at the high water mark of one of the worst floods in fictional Kcymaerxthaereal times.

Colorful murals by Jean Cocteau hide within this peaceful London sanctuary.

Installed at a chaotic intersection, this gave London traffic cops a place to hang their heavy woolen coats.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

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

Legends say that this Art Deco apartment building almost became Hitler's British headquarters.

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.”

A half-buried vehicle in Prague's is the latest iteration in a long-running piece by Czech artist David Černý.

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

The medieval "Bearded Man" relief still serves as a clever flood warning marker.

A sculpture of the iconic East German car on four legs is a tribute to those who traveled to Prague seeking asylum.

One man's personal collection of KGB memorabilia is presented along with his strange viewpoint.

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

The tunnel's elegant proportions keep you snug with no claustrophobia freak-out.

Nine bronze hands protruding from a wall honor the student uprising that led to the fall of Czechoslovakia's Communist government.

This spooky statue sits outside a famous Prague theater.

A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

A significant example of Czech cubist architecture—a style you won't find anywhere else in the world.

A plaque marks the spot where the saint was shoved off the Charles Bridge and into the river.

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

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