The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

This one-of-a-kind Roman arch is not actually dedicated to the god Janus.

Romans decided this 16th-century "talking statue" was so ugly, they named it after a primate.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

This curious, round temple is the oldest still-standing marble building in Rome.

A Nesting Doll of Churches.

A guitar mounted on a wall in Temple Bar honors the Irish musician.

A teddy bear sits on a chair watching the sunset from the mountaintop—just as the late Dan Clancy had done since childhood.

Ancient Bronze Age rampart that was used into the middle ages.

This Neolithic passage tomb forms part of a World Heritage Site.

This neon landmark has been posing this deadpan question to follicly-challenged Dubliners for over 50 years.

The severed head of a 17th-century Irish martyr lies within an intricate golden shrine.

This 5,300-year-old tomb with mysterious carvings crowns an Irish mountain.

A corkscrew-shaped barn in Ireland.

Obelisks and stone pineapples in the Irish countryside.

The ancient tomb acts as a calendar that keeps perfect time.

Spanning the El Chorro gorge, this pathway used to be one of the most dangerous crossings in the world.

A shining memorial to a Belgian hero is said to bring luck to anyone who touches it.

A little sculpture with a large wardrobe.

Hamburg's first legal sex work is relegated to a gated street that still does not allow pedestrian women.

Model Trains and Much More in Hamburg.

Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

Hamburgers are intensely proud of their tunnel beneath the river.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.