The vast, legendary catacombs hold secrets much stranger than stacked bones.

"Purveyors of traditional sweets and vintage treats."

This museum tucked below a charming cafe gives a brief snapshot of photographic history.

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

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

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

19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.

This luxury shopping lane has been protected by its own tiny police force for over a century.

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.

Public access to clean drinking water was an instant hit among the masses.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

An artistic tribute to the famous singer, just around the corner from where he was born.

A hidden treasure in London with a rich medieval history, and the resting place of many luminaries.

Claiming to be the oldest hat store in the world, this historic haberdashery had a hand (and a head) in the creation of the Bowler.

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

English antique dealers with a taste for the unusual.

A makeshift shrine to the late rock star is still kept up on the nondescript façade outside 1 Logan Place.

London's old-school healing garden.

The television series' iconic giant foot was borrowed from this classical painting.

A clock designed to run with perfect accuracy for 10,000 years.

Eighty million natural history specimens call this gargantuan museum home.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.