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

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

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

The oldest continual pilgrimage site in Britain was supposedly created by a gruesome beheading.

A curious collection of mechanical moving figures.

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

Possibly the oldest living thing in Europe, more likely a pagan survivor.

The childhood home of Earth's alien chameleon is a humble Brixton flat.

A red sandstone freestanding monolith rises out of the sea in northern Scotland.

Large-scale contemporary artworks tower over fields and lurk in forests around a Jacobean manor house.

A community of artists and entrepreneurs seeks a simpler life on London's waterways.

Possibly the oldest of Britain's ancient henges is also one of its most stark.

The stately remains of Llywelyn the Great's mighty fortress.

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

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

This medieval sanctuary's tree-framed door looks like a portal to a mythical realm.

Traveling collection of amazing automata.

This cramped crevasse saw the entire population of its island suffocated inside its depths.

This abandoned asylum in Wales might look haunted, but it's still beautiful.

Below a historic English market town lies a secret underground city complete with kitchens, laundries, storerooms, and an underground lake.

A small island abbey is the final resting place of many medieval Scottish monarchs, including the real Macbeth.

A site of pagan worship which still attracts people looking for fairies.

A naturally mummified 2,000-year-old man.

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.