A mysterious bridge over a sunken Roman road.

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

Sometimes an island, sometimes a rocky outcropping connected to the world by a tiny suspension bridge.

These ruins are a hidden gem, complete with fantastic views over the cliff edge.

A petite castle folly in the English countryside.

This giant wooden treehouse within a sprawling garden has its own eatery.

An eccentric aristocrat brought these Australian natives to their current Scottish home.

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

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

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

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

The world's oldest surviving music hall was also once a freakshow.

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

An 18th century monument regularly tagged with unsettling graffiti referencing a 1940s unsolved murder.

Modern megaliths form this work of cosmic, Celtic landscape art.

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

This Welsh village gave itself a ridiculous name in a publicity stunt a century ahead of its time.

This tiny little pool is said to be home to a malicious mermaid named Jenny Greenteeth.

Puzzles within puzzles hide a golden treasure in this hedge maze.

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

Cliffs full of fossils at the portal to England's Jurassic Coast.

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

A meandering boardwalk across the bogland leads to a "stairway to heaven" with sublime views.

A harem-inspired Moorish fantasy design in a Victorian-era Welsh castle.