A open air theatre built on a cliff by an eccentric British woman.

A network of bells in the pubs and restaurants around Westminster alerts politicians when it's time to cast their votes.

Legend has it that seven Anglo-Saxon kings were coronated on this stone, located in the appropriately-named town of Kingston.

Graffiti from the 16th and 17th centuries cover the walls of this part of the Tower of London.

An architectural oddity hides in plain sight on this iconic London bridge.

The wooden telephone box hidden away in London's Piccadilly was the original prototype of the iconic kiosk.

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Claiming to be the oldest hat store in the world, this historic haberdashery had a hand (and a head) in the creation of the Bowler.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

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

Giant, friendly pelicans in Central London, the most unlikely of places.

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

The final resting place to 300 Victorian-era pets hides inside the city park.

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

This little train station is forever immortalized in film history.

The castle where the Marquis de Sade lived out his darkest fantasies.

One of the most powerful religious centers in the Middle Ages, dubbed the founder of Western monasticism.

An effigy of a trapped paratrooper dangles from a Normandy church to commemorate one remarkable D-Day event.

Even France's favorite aquatic son Jacques Cousteau, couldn't get to the bottom of it.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

A memorial to the nearly 10,000 American soldiers laid to rest on the beaches of Normandy during WWII.

French commune at the heart of conspiracies.