This London plaque marks the spot where David Bowie's famous alien made his debut.

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

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

A naturally mummified 2,000-year-old man.

A 6th-century stone lies at the site of the mythical battle waged between King Arthur and his nemesis Mordred.

A historic arboretum and non-conformist, non-denominational park cemetery.

Following the trail of an old metro line, this scenic path is haunted by a creepy spriggan statue.

This legendary stone is of unknown origin, and throughout history has been a literal touchstone for British leaders.

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

Giant, friendly pelicans in Central London, the most unlikely of places.

Artists and musicians now rule over this former rail station.

Mary Kelly was last seen here before she was murdered by Jack the Ripper.

This hidden green space is the city's second largest conservatory.

The Metropolitan Police refurbished the blue box (perhaps not coincidentally) the same year "Doctor Who" returned to TV screens.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

The sixth of London's "Magnificent Seven" cemeteries, and a source of unlikely inspiration to Beatrix Potter.

The largest greenhouse in the world is home to over one million types of plants.

A cluttered and astounding collection of antiquities and curiosities.

Surreal riveted sea forts once protected the Kent shores from German attack.

London's smallest police station is barely the size of a phone booth.

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

A fantastic castle rumored to be the birthplace of King Arthur.

Catacombs turned marketplace.