One family's environment-friendly hobbit-house in Wales.

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

This picturesque archeological site looks like it was pulled straight from a fantasy novel.

This former abandoned hospital, a complex of stunning 19th century buildings, once housed 2,000 psychiatric patients.

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

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

Although it appears ancient and mysterious, the quirky folly was actually built 200 years ago by an eccentric estate owner.

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

This tiny little cave was said to have been a refuge for a saint with a glowing arm.

The highest peak in Wales is said to be the final resting place of a giant killed by King Arthur.

A castle in the Scottish Highlands has been continuously inhabited since the 1300s.

Stonehenge has nothing on Castlerigg’s views.

No one knows who created the statues or if they are arranged properly—let alone the artwork's real name.

Harry Potter once visited this massive limestone cliff, which was carved by an ancient glacial river.

This enchanting hill is home to fairy lore and a sinister local mystery.

A remarkably well preserved tower dating all the way back to the Iron Age.

More stones than Stonehenge, all scattered within a windswept landscape sure to enchant 'Outlander' fans.

This picturesque view of the Scottish Borders was beloved by Sir Walter Scott.

This lovely little burbling creek is actually a deadly waterway that has dragged down everyone who ever set foot in it.

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

The ruins of an 11th-century Norman castle with a rare, perfectly circular shape.

The mystery of this small, brick pond eluded its possibly only investigator until his death.

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

A glacial pothole was once a hideout for a notorious Scottish outlaw.