A beautiful and abandoned New York subway station from 1904, complete with chandelier.

This memorial was created by an Irish nurse who lived in New York City during 9/11.

The burial place of 14 of the executed leaders of the Easter Rising.

A gated cross stands on the site where an Irish revolutionary met his end.

It's said this geological anomaly was caused when the Devil took a bite out of the Irish mountainside.

Originally built to monitor fishing, this Victorian tower now educates visitors about the local salmon industry.

This cemetery overlooking the Benbulben rock formation is the final resting place of one of Ireland's most beloved poets.

A mysterious plaque to the even more mysterious "Fr. Pat Noise," killed in "suspicious circumstances."

This Copper beech tree nestled on a nature reserve is host to a bevy of autographs from Irish literary icons.

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

This colorful and fiery mural depicts the Irish folk story of the beloved hero Cuchulain.

These gigantic skeletons tower over visitors and provide insight into the creatures that once ruled over Ireland.

This beautiful site is where the first transatlantic telegraph was sent from.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

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

The world's only flying boat museum honors a small Irish village that sent 20th-century aviation to new heights.

This small Irish village suffered the greatest loss of life when the Titanic sank.

An abandoned faux-pub made famous by a Guinness commercial.

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

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

Catholics make up 84% of Ireland's population but this Dublin museum remembers the small but important Jewish community.

A particularly disconcerting tribute to Irish martyrs.

The house where the writer spent his formative years.

The skeleton of a whale that beached itself in this Irish town is now on display in their public park.