This "cursed house" features secret rooms, hidden vaults, and dark escape tunnels.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

A moody and picturesque riverside ruin overgrown with vegetation.

An eccentric garden of sculptures crafted in India decorate an Irish green space dedicated to Alan Turing.

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

The world of the ancient Celtic civilization explained through a bewitching 11 acre garden.

An Iron Age fort on the edge of a seaside cliff offers a glimpse into an ancient, mystical world.

A stunning Victorian abbey and walled garden on a lakefront.

Achill's most recently abandoned village dates back to to the Age of Enlightenment.

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

Once the longest bridge in Ireland, this rusting span sits abandoned and overrun by nature.

A standing relief of a Norman knight whose posture marks him as a Crusader.

This ancient Irish religious site is covered in ancient carvings, many of which have barely aged.

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

These imposing walls and towers look more like the ruins of a fortress than a monastery.