This landmark church concealed a crypt packed with bones that was discovered thanks to the London Blitz.

A Victorian park cemetery, standing on the site of what was once the Great North Wood.

An unusual round church in London with a Templar past.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

A subterranean ice warehouse that has lain hidden beneath central London for over a century is now open to the public.

The anatomical-pathological collection of a man who changed surgery.

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

This 15th century pub is one of only two pubs in England situated on consecrated ground.

London's largest outsider art museum.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

The bar where "The Great Train Robbery" was planned was once a nexus of high society and low morals.

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

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

The final resting place to 300 Victorian-era pets hides inside the city park.

Repository for more than 22 million pickled specimens.

The monster at the center of the Darwin Center Spirit Collection.

No one knows who created the statues or if they are arranged properly—let alone the artwork's real name.

England's oldest surviving hedge maze has been confusing visitors for over 300 years.

One of the largest sculpture collections in the U.K. features history's greats, from Bob Dylan to Galileo, in bronze.

Human-made caves excavated to hide a secret society of wealthy pagans.

Puzzles within puzzles hide a golden treasure in this hedge maze.

The hidden "ballroom" under a mansion lake was built by a criminal who ate a cyanide pill during his trial.

This former quarry is now a vibrant labyrinth of magical in situ sculptures.

The world's only managed flock of mute swans was established as a factory for monk meat but is now an adorable sanctuary.