A labyrinth hides in plain sight at each of the city's 270 Tube stations.

A quiet memorial to those who died saving others in the heart of the City of London.

A recreation of a sign that Charles Dickens used to see on his walk home.

This 1920s Dutch barge is now a floating bookstore.

Visit the grave of a famous feminist author and the mother of Mary Shelley.

This massive blockhead sculpture hides an entire library.

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

This pair of statues commemorates a once-widespread carnival tradition of blowing on each other’s butts with bellows.

Guests can stay at a hotel in the former French abbey where lie the tombs of King Henry II and King Richard the Lionheart.

Site of a classic 19th-century physics experiment to prove the earth is rotating.

Hidden away in a modern library are the remains of one of the 18th century's most celebrated wunderkammers.

A majestic lion statue guards this Parisian botanical garden, and feeds on an unsettling item.

A gruesome combat between a hunter and a furious momma bear.

A lone cannonball remains lodged in the walls of the Hotel de Sens as a sober reminder of a revolution.

For more than a century, revolutionary graffiti has marked the wall of a Parisian church.

Executions were once held near this beautiful 18th-century fountain.

The spiral staircase hidden inside this giant Parisian column was likely built for Catherine de Medici's astrologer.

With a history of slaughter, feast, and famine, remnants of the pork industry decorate this area--even its church.

The video game-themed street art first popped up in the French city.

Ordinary art transforms to extraordinary thanks to locals' quirky sense of humor.

The oldest continuously operating mint in the world that has been making coins since the 9th-century.

A total of 22 tiny bridges cross this canal of the Yvette River, forming a unique trail.

This small island, a byproduct of 19th-century canal construction, is now home to a charming Japanese garden.

This banal Parisian entranceway is not what it seems.