An 80-year-old plane tree is devouring an iron bench at Ireland's oldest law school.

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

The enchanting archway is the only surviving portal into Dublin's lost medieval wall.

Experience what life was like in Ireland during the Viking and medieval ages.

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

The oldest public library in Ireland.

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

The chaotic studio of one of the 20th century's most important artists has been preserved down to the dust.

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

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

The ruins of a thousand-year-old hermitage are tucked away deep in the sloping forests of Albano Lake.

Medieval town turned hippie commune, once home to the secret foreskin of Jesus Christ.

Hidden within this iconic mountain are a set of World War II bunkers once used by German forces.

A lavish 16th-century mansion filled with spectacular staircases, fantastic frescoes, and gorgeous gardens.

The leathery remains of a woman who died in the 13th century now lie in a church named for her.

This archaeological site built into a tuff outcrop is filled with rock dwellings, the ruins of a medieval castle, and a necropolis.

Ancient, mysterious stone altars are hidden among wild woods in central Italy.

A 16th-century horror show built in a lovely Italian garden.

This ancient altar emerges from the thick forests to reveal the mysteries of Etruscan sacrificial rituals.

A fascinating assortment of cave dwellings, medieval ruins, and sarcophagi are being devoured by the forest.

Italian director Pier Paolo Pasolini fell in love with this lonely 13th-century tower while making his most famous film.

This picturesque Umbrian city has a subterranean side that has long remained hidden.

Nestled in the hills of Tuscany are gorgeous, multicolored hot springs.

This 16th-century monastery has been turned into a surrealist architecture compound.