A network of concealed passageways lies within a busy London Underground station.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

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

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

An ancient healing font dedicated to an 11th-century matriarch was moved to make way for progress.

A never-finished memorial to the heroes of the Napoleonic War has become "Scotland's Folly."

A collection of unique objects showcasing the university’s achievements in the medical field.

This charming old building's loose connection with the Scottish Reformer is what saved it from demolition after it split apart.

Overlooking the burial ground is a tower designed to prevent thieves from snatching the recently deceased.

Neon artworks light up this dark Edinburgh tunnel.

The 20th-century chapel’s intricate woodwork includes amazing details, most notably angels playing bagpipes.

Touching this 18th-century Scottish philosopher’s toe allegedly conjures good fortune.

This small museum in a 17th-century building honors three iconic Scottish writers.

A sweet symbol marks the place where torturous executions were once carried out.

Sprawled across the Great Hall ceiling are various constellations and images relating to the zodiac.

The taxidermy remains of the first mammal ever cloned from an adult cell are on display in Edinburgh.

This obscure walkway links Edinburgh’s Old Town with one of the city's prime vantage points.

A book bound in the skin of an infamous criminal, along with countless other specimens.

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

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

Two stunning 17th-century libraries and a cabinet of curiosities.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

A plaque marks the spot where the saint was shoved off the Charles Bridge and into the river.

A grumpy old water goblin guarding an old mill on the Devil’s Stream in Prague.