A rocky Irish outcropping with a history of wealth, conflict, and ruin.

This singular Irish dolmen is more Frank Lloyd Wright than upright stonehenge.

Traveling this mountain pass reveals quaint stone buildings, stunning Irish scenery, and a bridge said to grant wishes.

A corkscrew-shaped barn in Ireland.

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

An ancient neolithic tomb that only sees the sun twice a year.

A strange egg in a mucky bog of western Ireland marks the spot of an aviation milestone.

This single room has survived the centuries with almost no deterioration.

One of the most popular megalithic sites in Ireland stands as a humbler version of Stonehenge.

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

The sunken structure looks like the victim of a catastrophic flood.

A cave dwelling that was started by the Celts, expanded by monks, and finished by knights.

This historic electric train has operated with regularity since the early 1900s.

This "flat geyser" bubbles up out of the ground periodically like a disappearing river.

Explore an eerie, abandoned medieval citadel.

Abandoned Nazi train station turned underground astroparticle laboratory.