This magnificently macabre shield shows the power of chivalrous love in medieval times.

The medieval woodcut-style artwork chronicles life in medieval London.

This Underground station has been a popular filming location for decades, even before it closed.

The next-door homes of two very different musicians, George Frideric Handel and Jimi Hendrix.

A domino effect created with Britain’s iconic telephone boxes.

This coffee shop lies hidden beneath a historic church.

Classic game cookery takes center stage at what's widely considered London's oldest restaurant.

The sculpture of the deceased cockatoo flops atop its personal plinth.

Art Deco and “Wrenaissance” mash-up, this recently restored royal residence has been home to kings and comes with secret monkey passages included.

The library houses an incredible collection of some of the world's most impressive books and manuscripts.

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

A relic of Victorian grandeur hides beneath a busy South London road.

A mysterious pair of mice eating a piece of cheese is London's smallest public sculpture.

This beautiful Victorian ironwork masterpiece was built to keep London from smelling like poop.

Collection dedicated to brands, packaging and advertising.

The television series' iconic giant foot was borrowed from this classical painting.

A cluttered and astounding collection of antiquities and curiosities.

A 2000-year-old Roman amphitheater lies just below Guildhall Yard.

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

A historic London pub with prison cells in the cellar and a "spy room" on the second floor.

This 1920s Dutch barge is now a floating bookstore.

Catacombs turned marketplace.

Rebuilt remains of a temple to Roman god Mithras.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.