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

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

Northern Ireland's Brobdingnagian stepping stones.

An Irish cemetery filled with victims of political strife and violent conflict, including the grave of Bobby Sands.

Walk upon the mementos of the dead in this Parisian courtyard paved with medieval tombstones.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

Exquisite wall sculptures carved in secret by an early quarryman in an obscure corner of the Paris Catacombs.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

France's most famous cemetery, with some of its most curious tombs.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

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

BDSM, 1930s Style.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

The remaining relics of the patroness of Paris lie in a chapel under a striking double spiral staircase.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

This massive library holds what was once the largest book collection in the world.

The celebrated eyesore created by starry-eyed sweethearts.

Noirish green neon marks the location of one of the oldest private detective agencies in France.

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

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

An exquisite panometer representing Dresden as it was from 1695 to 1760.

In addition to fine dairy products, the world's most beautiful milk shop also offers a feast for the eyes.