A magnificent winding road through a steep valley, with deep natural caverns at the bottom

Under a church hides a forgotten 13th-century ossuary containing the remains of around 2,500 people.

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

The quiet field that inspired one of the most famous songs of all time.

This unchanged Victorian park is rumored to have been the inspiration behind Peter Pan's Neverland.

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

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

The largest oak in England is said to have been the hideout of Robin Hood and his Merry Men.

The granddaddy of English geoglyphs dates back to the late Bronze Age.

St. Mary's Asylum was isolated and abandoned before being converted into a Bed and Breakfast.

An English artist has turned an unassuming ex-council house into a time-lost house of mystery.

The sculpture is made of more than 100,000 knives collected to raise awareness about violence.

Colin Stokes "got a bit carried away" and built a castle that looks like something out of Tolkien.

One of the largest sculpture collections in the U.K. features history's greats, from Bob Dylan to Galileo, in bronze.

A house of bones — but nobody is quite sure to whom they belong.

This haunting stone chasm is a hotbed of mossy rock and English legend.

This Manchester laundromat is hiding something.

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.

A miniature Italianate fantasy village on the coast of Wales and the set of ITC classic "The Prisoner."

Western Europe's only representation of a Roman goddess still in its original location sits in an unassuming park.

A familiar otherworldly creature guards this 12th-century Scottish abbey.

Created hundreds of years ago, the magical follies and landscapes at this park were almost lost to time before being restored.

A metal tree emits eerie, melodic notes on top of Lancashire's Crown Point.

The largest cave chamber in Britain—big enough to fit a whole cathedral inside.