This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

This modern museum of Mediterranean culture is surrounded by a surreal concrete honeycomb.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

Golden cobblestones remember a time when this small alley was used to avoid having to give a Nazi salute.

Go surfing on this urban wave, "hacked" by local surfers.

The patron saint of spinsters grasps a container of dried blood.

Terrifically morbid cemetary and site of famous Paracelsus' grave.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Sweden's "good old days" painstakingly re-created in a model village.

Across the Pacific in a raft, a museum dedicated to Thor Heyerdahl's now legendary expedition.

Housing the famous Norwegian ice-defying 19th century polar exploration ship.

Home to three historic ships from the age of Vikings.

The attic of a four-century-old canal house hides a clandestine church.

A number of craters left by fatal mortar strikes have been filled with red resin to remember those lost during the Siege of Sarajevo.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

An ancient ossuary in Rouen.

This giant urban staircase was built to keep the city's brave fighting men from getting waylaid in the red light district.

A former ironworks that was the first UNESCO industrial site.

Tiny castle in the middle of the Rhine made you pay to pass.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

Dress up like a miner and take a slide into the disco-lit depths of this once foundational salt mine.

The place where World War I began.

Fountain where visitors can earn a license to be mad.

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.