What was once England's second-richest abbey is now a haunting ruin.

The dramatic remains of an abandoned farmhouse sit high on the edge of a remote hillside.

This hospital once pioneered the use of electroencephalograms, but fell into maltreatment, abuse, and eventual abandonment.

A repurposed railway tunnel with otherworldly acoustic characteristics.

The ruins of a 19th-century corn mill are haunted by a malevolent cave-dwelling spirit.

An abandoned tank sits in an empty London lot as a symbolic middle finger to local city planners.

The secret wartime bunker built on the platforms of an abandoned Tube station.

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

The ghosts of Britain's telecommunication past sit rusting away in a small village in England.

The world's largest prehistoric copper mine had 30,000 animal bones scattered throughout the maze of passageways.

Museum about life, death, and cannibalism in the Stone Age.

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

A hidden gem in the middle of the city's infamous Jewelry Quarter.

This mysterious hilltop collection of Druid carvings isn't quite what it seems.

Inspired by a dream, a hermit carved out a home in this sandstone bank to live a life of contemplation and prayer.

A spooky juxtaposition of caves and graves gives this legend-filled cemetery a particularly haunting vibe.

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

This romantic, decaying 13th-century ruin on the edge of Sherwood Forest is reputedly one of England's most haunted places.

A 19th-century subterranean reservoir repurposed as a contemporary art cave.

A labyrinthine network of chambers with a storied past hides below Edinburgh's South Bridge.

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

Hidden on the urban banks of a Manchester river are a series of abandoned waterside industrial sites.

An abandoned canal route lies hidden under the streets of Manchester.

There's a labyrinth of manmade tunnels stretching for over an acre beneath Bristol.