Northern Ireland's Brobdingnagian stepping stones.

The atmospheric road was never meant to be so creepy.

The lake that fills and empties itself at random.

This stone harbor was key to Carnlough's limestone industry.

The ruins of this medieval castle in Northern Ireland have inspired artists from C.S. Lewis to Led Zeppelin.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

Oliver Cromwell once seized the land under this house, which included the ruins of a medieval abbey that the owner used to build his stately home.

The ruins of a medieval monastery named after a type of tree.

A stunning Victorian abbey and walled garden on a lakefront.

Wander among the abandoned ruins of this once-powerful medieval town.

Just a few miles off the western coast of Ireland lies an isle steeped in Irish literary history.

A spectacular hidden beach in Ireland has the dark, disturbing nickname of "Murder Hole Beach."

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

The oldest public library in Ireland.

A corkscrew-shaped barn in Ireland.

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

A moody and picturesque riverside ruin overgrown with vegetation.

A remarkably intact castle that once was the largest in Ireland.

Obelisks and stone pineapples in the Irish countryside.

The oldest pub in Ireland may also be the oldest surviving bar in the entire world.

Local legend says the remains of Father Christmas lie within the medieval grounds.

An 80-year-old plane tree is devouring an iron bench at Ireland's oldest law school.

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

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.