Walk upon the mementos of the dead in this Parisian courtyard paved with medieval tombstones.

Protecting the dead from opportunistic body snatchers.

A 18th century graveyard and its astonishing cortege of macabre iconography.

Ruined castle with subterranean vaulted Goblin Ha' or "Goblin Hall."

A church that bred legends, and served as an inspiration for the Da Vinci Code.

This series of Scottish caves has no clear purpose other than baffling historians.

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

The signs of a long buried road can still be found hidden beneath a London sewer grate.

A mysterious artist-run cabinet of curiosities and library.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

A five-story homage to tea times past.

Remnants of a Victorian garden feature sitting in public woodland.

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

Eclectic final resting place of the controversial explorer.

Art Deco and “Wrenaissance” mash-up, this recently restored royal residence has been home to kings and comes with secret monkey passages included.

Shakespeare, David Bowie, Dr. Who, the Saxons, Druids and Romans are all claimed to have all made their mark on these massive man made tunnels.

Fantastically decorated underground chambers built in the 1760s.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

The final resting place of New Orleans' most famous voodoo priestess.

A 200-year-old building in the French Quarter that was to be Napoleon's home in the New World.