Huge concrete structures designed as an early warning system for Britain to detect enemy aircraft.

This network of narrow, medieval passages has the most delightful name.

A Victorian school for poverty stricken waifs has been preserved as a museum to their donated education.

This strange moor has a song written about it, Bronze Age carvings, and an alien sighting.

This centuries-old hotel hides a network of secret cellars and passages once used by smugglers.

A village on the east coast of England that has almost completely eroded into the North Sea.

This logic-defying 16th-century Tudor manor still stands to the delight and astonishment of onlookers.

The abandoned funicular tunnel was a secret base for the BBC during World War II.

This antique prison is a tourist attraction with a sordid past.

These legendary stone steps were once used to haul coffins up the rockface.

You can spend the night in Dr. Frank-N-Furter's castle.

A gorge full of caverns where early humans lived alongside cave hyenas, giant mammoths and wooly rhinoceroses.

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

Each spring this woodland floor is carpeted with purplish flowers as far as the eye can see.

A circle stone within a stone circle.

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

Oxford University's stateliest library seems designed to make students truly feel the weight of knowledge.

Near Birmingham, England three and a half miles of top-secret tunnels housed a World War II “shadow factory” and a Cold War nuclear bunker.

A labyrinthine underworld of tunnels and caverns hides beneath the city.

Local legends say that fairies used to dance in the moonlight here and invite handsome young men into their grottoes.

A mysterious bridge over a sunken Roman road.

There's a labyrinth of medieval chambers hidden deep below a 15th-century pub.

The broken skateboards that became a poignant memorial to a murdered skater.

What started as a way to address damp basement walls turned into a house filled with intricate hand-carved designs.