This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

A museum dedicated to the Spanish occult in a town that was terrorized by the Inquisition.

Commonly acknowledged as the only public monument to the Devil himself.

Experience the hysteria of a 17th century witch hunt through goofy reenactments and wax dummies that should probably be burned at the stake.

This floating garden in the sky is straight out of a fairy tale, but the real thing is nothing short of magical.

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

A particularly disconcerting tribute to Irish martyrs.

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

While only two of the ancient buildings at this site are actually churches this was one of the earliest Irish pilgrimage sites ever.

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

A sacred well steeped in Pagan roots on the West Coast of Ireland.

An 1814 castle that hosts an exhibit of "explorabilia".

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

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

This ancient Irish religious site is covered in ancient carvings, many of which have barely aged.

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

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

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

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."

A museum that cashes in on its infamous little people while teaching you a thing or two about the Irish fey.

Some of the saint's blood and bones are said to reside in Dublin.

The mummified heart of a saint lives on in this church—after a brief hiatus when it was stolen.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

The sign at the garden gate reads: "These Plants Can Kill."