This Irish show cave is said to have been the site of a Viking massacre that claimed 1,000 lives.

The block of aged dairy is probably still edible after 2,300 years in a peat bog.

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

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

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

A nun spent 16 years painting the stunning Celtic mural that covers the interior of this WWI memorial.

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

A museum of carnival attractions where you are invited to ride the rides.

Notorious artist squat renovated into legal studios.

Indents in the pavement are all that remain from a grisly death machine in Paris.

This Parisian café sticks almost exclusively to an ethos of reuse.

In the best of all possible worlds, everyone will get a chance to see this statue in which Voltaire's heart is interred.

Statue of death tucked in the University of Medicine courtyard.

The history of radiation is on safe display at the foot of a radiation science laboratory.

Skeletons, medical artifacts, and other obscure and precious treasures all displayed in a wooden pharmacist's cabinet.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

An iconic and eccentric bar for "Manouche" Jazz music keeps expanding its space—and its influence.

A popular shrine where the Blessed Virgin allegedly appeared in 1830, displaying a holy armchair and two incorruptible remains of Lady Saints.

This bridge was constructed from the rubble of the infamous Bastille.

This demon atop the Notre-Dame de Paris looks utterly bored.

Known as the "Dodo Manège," this carousel features a herd of animals that have disappeared—or may be gone soon.

A mechanized clock where a man fights off a dragon, crab, and rooster.