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

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

This Viking gravestone carved in a rare runic style was dug up from a London churchyard.

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

The sumptuous ceiling was one of the last things Charles I saw before his execution.

The barrel-made lookout from Shackleton's final ship is tucked away in the crypt of one of London's oldest churches.

The Florence Nightingale Museum is home to the famous nurse's most treasured possession: her beloved pet owl.

Black cat statues guard this temple-like Egyptian revival factory.

Originally built for London’s cab drivers, this bright green hut now serves anyone a hot drink or meal.

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

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

The wooden telephone box hidden away in London's Piccadilly was the original prototype of the iconic kiosk.

A memorial to a dog that inspired rioting in the streets of London.

Installed at a chaotic intersection, this gave London traffic cops a place to hang their heavy woolen coats.

An eccentric 18th century naval officer built a ship's quarterdeck on his roof, the inspiration for Mary Poppins's "Admiral Boom."

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

A monument to the thrice mayor of London who according to lore made his fortune by selling his rat-chasing cat.

A measuring mishap led to these artificial stone ladies losing their stomachs.

A tiny replica of the iconic London landmark hides on the side of the steel structure.

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

The Tudor-style cottage in the middle of the square is not quite what it seems.

This small collection of rare books was uniquely locked up for safe keeping.

This London marker celebrates the spot where the world-famous English band was founded.

A faded reminder of what was once a common sight in London during the Blitz.