Why a column on the entrance is inscribed with a verse from the Quran is one of Sicily's many mysteries.

Touching mementoes from those who didn't make it back from World War I still hang in one of New York's oldest bars.

The 16th-century church has the only stained glass windows that survived the Scottish Reformation intact.

Near the former site of numerous witch burnings, this lavish Edinburgh mainstay pays homage to Scotland's brutal history.

This meticulously extracted nervous system allegedly came from a 19th-century custodian who donated her body to science.

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

Dublin's "Dead Zoo" serves as a window to Victorian museum design.

A celebration of capitalism in Midtown.

Cave shrine on Monte Pellegrino.

The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

This hill made entirely of ancient Roman jars was simply a garbage dump to the people of the time.

Breathtaking and huge 430 year old maps of Italy.

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

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

An alchemist's “magic door” stands in the middle of a Roman park.

The final resting place of the poets Shelley and Keats.

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

Rome’s legendary peephole vista is also a former Crusader stronghold.

A sculpture serving as an homage to Pope John Paul II.

Museum dedicated to literary greats of the Romantic Period is also the home in which Keats met his untimely end.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

A hospital where antique dolls are given new life.