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

A relic from one of London's worst 19th-century slums.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

Where condemned pirates met their grisly end at the gallows on the River Thames.

The taxidermied remains of a once-great parrot.

The broken skateboards that became a poignant memorial to a murdered skater.

Museum dedicated to the UK's first charity for abandoned children, with keepsakes of the mothers who left them behind.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

This pump on the bad side of Victorian London betrayed a horrifying revelation about the water supply.

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.

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

Spitalfields' regal market goat is said to be a monument to the area's migrant population but most are pretty sure it's just a goat.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

This one has sailed five times as far as Sir Francis Drake's famous ship.

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

A museum wholly devoted to juvenescence.

You'd never know the houses at 23-24 Leinster Gardens were fakes—until you see the train tracks on the other side.

The remains of the great moral philosopher reside in a university in London.

A friendly pub with a sordid past in cock fighting.

This artist's home turned gallery/museum preserves the creator's love of "Eastern" influences.

The London pub overlooks where the Mayflower was moored before setting sail for the New World.

A glorious pub known for a spiteful printing feud and its famous typeface lost—then found—at the bottom of the Thames.

The cedar tree in Highgate Cemetery earned its title by accident.

Public access to clean drinking water was an instant hit among the masses.