This 19th-century prison once held Irish revolutionary Constance Markievicz, writer Frank O’Connor, and a nine-year-old pickpocket.

One of Ireland's best-preserved chambered cairns can be found next to a wishing tree.

One of the oldest lighthouses in the world, this structure was built more than 800 years ago.

Once an early Christian burial site, it's believed the location was home to around 200 gravestones.

An elaborate Romanesque archway, built right before the British occupation of Ireland.

Horse cemetery on the grounds of Blarney Castle.

One of Ireland's lesser-known megalithic structures.

The ruins of a sixth-century monastery sit on the banks of the River Shannon.

A diminutive, thousand-year-old church believed to be the smallest in Ireland.

The ruins of a monastery that dates to the 7th century.

The largest stone circle in Ireland.

The remains of a 13th-century Franciscan friary have survived multiple attempts at destruction, most recently in 1921.

This rare and ancient Christian relic is one of Ireland’s oldest freestanding stone crosses.

Fantastic stainless steel dragon gates complete with mesh wings.

An Irish peat mine has become a stunning sculpture park.

A stunning medieval castle owned and restored by the famed actor Jeremy Irons.

A mysterious Neolithic tomb is perched along the edge of a modern golf course.

A stone wall that mysteriously moved three feet from its foundation.

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

A Neolithic passage tomb said to have sheltered two legendary Irish lovers.

An ancient holy well said to be used by the patron saint of sailors and travelers, lost in the boggy west of Valentia Island.

The whiskey producer's archives includes a historical list of infractions committed by and associated penalties exacted upon employees.

This 14th century tower house was once the home of Irish poet W.B. Yeats.

This Neolithic passage tomb forms part of a World Heritage Site.