The pretty iron lamp is a reminder of the architecture underneath London's streets.

England's most famous front door has an accidental doppelganger.

A series of carved figures that scandalized British society.

This coffee shop lies hidden beneath a historic church.

An unusual ode to the late Irish playwright, complete with a squiggly bust and coffin-shaped bench.

A little slice of Japan and its aesthetics in London's Holland Park.

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

Where Aleister Crowley attempted to seize the Hermetic Order of the Golden Dawn in a mask and a kilt.

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

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

This unique bridge curls up like a caterpillar to let boats pass and then unfurls again to span a small canal.

This preserved puppy was an adorable beacon of charity.

The historic villages and towns of Suffolk are filled with wonky wooden beam houses painted an unusual shade of pink. Unknown to many though, this sweet shade has a bloody history.

Ship-sized kinetic sculptural fantasy.

An incarceration museum on the spot of possibly the oldest prison in England.

Where condemned pirates met their grisly end at the gallows on the River Thames.

A plaque marks the underground site of one of London's "lost rivers."

It is still illegal to "quarrel" at this unlikely urban oasis built on top of an electrical substation.

This five-star hotel was originally a swanky parking garage.

A unique tribute to the millions of animals who served and died for the British military.

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

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

The history of this famed tree ranges from an 18th-century highway robber, to the Scout Association.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.