This crumbling folly looks like an enchanted left over from Middle Earth.

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

This tiny getaway tucked away in an uninhabited Scottish valley isn't your ordinary teahouse.

Final resting place of John Middleton "The Childe of Hale."

This wildly-tiled artist's palace is a living and growing account of the creator's life, loves, and labors.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

Ancient cliffs resembling a kilt on Scotland's second largest island emit an entrancing sound.

This floating garden in the sky is straight out of a fairy tale, but the real thing is nothing short of magical.

A historic London pub with prison cells in the cellar and a "spy room" on the second floor.

An incarceration museum on the spot of possibly the oldest prison in England.

400-year-old garden, restored to beauty.

This Irish show cave is said to have been the site of a Viking massacre that claimed 1,000 lives.

A fantastic castle rumored to be the birthplace of King Arthur.

The site of London's first coffee house has been serving refreshments of one kind or another for 360 years.

The anatomical-pathological collection of a man who changed surgery.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

Remnants of a Victorian garden feature sitting in public woodland.

A tiny microvalley etched into the side of Knocknarea Mountain hides another world.

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

A strange rock with a sinister reputation lurks within the crimson waters of this Scottish glen.

The world's first underground farm is in a World War II bomb shelter beneath the streets of London.

This castle was established by the 4th Duke of Montrose and is connected to the Buchanan Clan.

This tangled English forest looks like something right out of a fairytale.

Wedged between two buildings at the Great Ormond Street Hospital is this secret music installation.