An 1814 castle that hosts an exhibit of "explorabilia".

An unusual manor of stunning beauty, born out of a crippling disease.

Impressive mining ruins overlook a spectacular view of Ireland's Copper Coast.

Just another ancient, mysterious Irish stone circle.

A tribute to the incredible generosity the Choctaw Nation showed the Irish people during the Great Famine.

An important landmark in the history of algebraic logic.

These haunting ruins belong to an ancient village that once had one hell of a view.

Legends say that this small island was the final resting place of the Welsh saint of lovers.

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

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

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

A former fisherman's hut deemed too small for habitation is now a delightful tourist draw.

A subterranean playground in an abandoned slate mine.

The largest greenhouse in the world is home to over one million types of plants.

400-year-old garden, restored to beauty.

The world’s largest magazine collection was born from a single shelf in a teen’s bedroom.

Remnants of a Victorian garden feature sitting in public woodland.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

Astonishing rock formations dot the Brimham Moor landscape.

Where Agatha Christie mysteriously disappeared in 1926.

This strange moor has a song written about it, Bronze Age carvings, and an alien sighting.

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

A modern English garden of eccentric beasts, follies, and oddities.

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