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.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

A collection of housewares from recent Irish history adjoined by a tower from ancient Irish history.

Huge standing stones mark a site of megalithic mystery.

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.

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

This controversial Irish show cave is home to a massive formation known as the Great Stalactite.

One of Ireland's most infamous prisons for rebels including men, women and children.

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

The largest portal tomb in Europe has a capstone weighing around 150 tons.

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

After a traumatic encounter with a six-foot eel, one Galway baker started making a daily loaf of sourdough in its shape.

This World War II relic let Allied pilots know they were entering neutral airspace.

See some of the world's greatest racing horses at this idyllic thoroughbred breeding facility and garden complex.

The ancient tomb acts as a calendar that keeps perfect time.

A devastating booze inferno poured through the streets, claiming several victims who drank it.

A corkscrew-shaped barn in Ireland.

Obelisks and stone pineapples in the Irish countryside.

There has been an astronomical clock on this spot since the 14th century.

This 14th century wine cellar is home to the oldest barrel-stored wine in the world.

Standing in this historic plaza is a statue representing one of Cuba's most iconic literary characters.

After the Cuban Revolution, the famous rum company had to leave their swanky headquarters behind.

No one knows the meaning behind this giant sculpture of a nude woman with a fork riding a rooster in Havana.