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

London's amazing modernist public square that never was.

An unsanctioned shrine that sprung up outside the late singer's home is causing a stir in London's Highgate neighborhood.

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

You will not be able to miss this building.

The grounds of this Jacobean estate contain one of the oldest mulberry trees in England.

This intricately carved and hilariously huge bed was such a famous symbol both Shakespeare and Byron used it in their writing.

A network of concealed passageways lies within a busy London Underground station.

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

Three small rooms at the back of the “official” church of London's clowns.

Residential building on the Regents Canal is a breeding ground for creativity and innovation.

The breadfruit-adorned final resting place of the infamous Captain of the HMS Bounty.

A Victorian school for poverty stricken waifs has been preserved as a museum to their donated education.

This home on a quiet suburban street is completely covered with vibrant mosaics.

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

Shiny Brutalist box commemorates a pioneer of electricity and houses a railway transformer.

A flourishing garden with pigs, donkeys, goats, rabbits, guinea pigs, chickens, ducks, and sheep.

Taxidermied animals galore, by appointment only.

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

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

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 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.