Macabre astrological automaton clock dating to the late 1400s.

A church of bones, decorated with 40,000 human skeletons.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

Ireland's only German military cemetery holds the remains of a spy who was moved there under the cover of darkness.

A statue in the center of Dublin dedicated to one of their favorite sons of rock & roll.

Ireland's most remarkable collection of these curious cone-shaped houses is worth the buzz.

A particularly disconcerting tribute to Irish martyrs.

The modern birthplace of Irish freedom.

The 19th-century pharmacy (now a used bookstore) was featured in James Joyce’s "Ulysses," and has changed very little to this day.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

A hugely vast Irish landscape of barren rock that stretches for miles.

Amidst the bustling streets of Dublin, there is a hushed garden that is dedicated to "All those who gave their lives in the cause of Irish Freedom."

This ancient Irish tower could easily have stood in for Rapunzel's prison.

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

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

The oldest inn in Kilkenny was established by the first convicted witch in Ireland.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

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

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

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

The world's second-longest burning light bulb.

Feed it cash, get your very own gold bar.

Whitewashed mosque contains the world's largest carpet.