This impressive collection of rare books on ancient mysticism inspired author Dan Brown.

Hidden behind a wall for decades, this masonic lodge was only rediscovered during renovations.

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

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

Under a church hides a forgotten 13th-century ossuary containing the remains of around 2,500 people.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

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

A historic house left in "dramatic still life."

The hidden lair of an alchemist rediscovered in a 2002 flood.

A former fisherman's hut deemed too small for habitation is now a delightful tourist draw.

Seat of the Duke and Duchess of Devonshire for centuries.

This witch statue remembers a time in England's history when fear trumped truth.

One of the world's oldest trees comes with a Welsh legend intertwining it with a spirit prophesying death.

The last of the 19th-century booze-free bars has been slinging teetotal tonics for over a century.

These lovely Turkish-styled baths were brought back to life after winning a reality show competition.

Despite having a dome made of papier-mâché this tiny observatory has survived for over a century.

A 19th-century time capsule of travel, fiction, and historic texts still available to the public.

This abandoned asylum in Wales might look haunted, but it's still beautiful.

England's foremost purveyor of funeral furniture hasn't changed a bit since the 1960s.

In 1943 the British military took control of this village, telling residents they had to leave temporarily. The villagers were never allowed to return.

How did a French journalist’s grave become the sexiest statue in the cemetery?

Science fiction's grandfather has a fittingly marvelous tomb.

This neolithic stone grave has been altered and restored so often its now more neo than lithic.

Picturesque ruins once held off mighty armies.