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

William Blake claimed to have painted this gothic masterpiece after encountering this nightmarish being in a vision.

Human-made caves excavated to hide a secret society of wealthy pagans.

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

The secret wartime bunker built on the platforms of an abandoned Tube station.

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

"We gonna rock down to Electric Avenue, and then we'll take it higher..."

The last four extravagant street signs of London's historic banking street.

More than a million titles fill the labyrinthine shelves of this prestigious private library.

A friendly pub with a sordid past in cock fighting.

The townhouse where the English poet created some of his most influential work has been preserved in tribute.

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

Tombstones and enigmatic inscriptions hide within a vault beneath a popular London arts venue.

St. Mary's Asylum was isolated and abandoned before being converted into a Bed and Breakfast.

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

This pub was 238 years old when it decided to revamp its image: It started serving Thai food.

This long-hidden space above Westminster Abbey now displays the battle gear of the legendary King Henry V.

Never actually a tree at all, this spot was the site of London's public hangings for nearly 600 years.

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

These morbid carvings remind churchgoers of the inevitability of death.

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

This elaborate Byzantine-style building was designed for a not-so-pretty purpose.

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

Lovers proclaim their unbreakable bond by leaving their names on locks fastened onto the Shoreditch fence in East London.