On October 17, 1814, a 15-ft. wave of beer ran rampant through the streets of London.

This third-generation institution is one of the last in London that still cures its own salt beef for epic sandwiches.

This 19th-century pub features stained-glass windows celebrating Victorian-era “champions.”

An eccentric Victorian aristocrat's enormous collection of medieval armor and weapons from around the world.

A plaque marks the underground site of one of London's "lost rivers."

Tucked away behind the mansions of Mayfair, this picturesque garden is a hidden London treasure with a spooky past.

This overlooked street light once served as a KGB dead letter box.

This five-star hotel was originally a swanky parking garage.

It is still illegal to "quarrel" at this unlikely urban oasis built on top of an electrical substation.

Heralded as the oldest statue in London.

This London plaque marks the spot where David Bowie's famous alien made his debut.

The real clothing store that inspired a fictional spy organization's front.

A storied London perfume shop that supplies scents for royalty has been operating out of this storefront for nearly 300 years.

This statue includes the molehill that toppled a king.

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.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

Outside of one of Britain's most renowned social clubs, a step installed specifically for the Duke.

The final resting place of a German diplomat's beloved companion.

This coffee shop lies hidden beneath a historic church.

The graveyard with the highest IQ in Britain.

Students can borrow artwork from this gallery to display in their own residences.

This tree was grafted from the actual tree that led Isaac Newton to ponder the theory of gravity.

Named after a lodging site that existed nearby, a bridge has existed at this location since 1455.

A complicated contraption for telling time by the moon.