This underpass became an unlikely piece of cinematic history after its appearance in 'A Clockwork Orange.'

Crafted by one of the first makers of stoneware in England.

This once-controversial and slightly confusing statue of Achilles was built out of captured cannons.

This surreal art house looks like a geometric version of a small chapel.

This 400-year-old house tells a tale of witchcraft and woodwork.

You won't find these curiously named passageways anywhere else in England.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

It celebrates a very stinky task and salutes London's fatberg-vanquishing team.

Metal horses galloping through a London fountain provide a link to the city's past.

A hidden treasure in London with a rich medieval history, and the resting place of many luminaries.

There's an exclusive Beefeaters pub hidden in the Tower of London.

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

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

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

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

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

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

A discarded movie prop that was the original monolith for "2001: A Space Odyssey."

This unassuming alcove in London’s famous Tower Bridge once served to capture, store, and display dead bodies from the River Thames.

An abandoned tank sits in an empty London lot as a symbolic middle finger to local city planners.

The fences outside some of South London's estates are made from recycled World War II stretchers.

Before becoming a poet John Keats studied here to become a surgeon.

Near the site where the English Archbishop was born, you can find an emblem in the shape of a pilgrim's badge.

London's only public statue of the much-married monarch adorns the gate to St Bartholomew’s Hospital.