No one is sure if the world's fourth-largest diamond had been found in a rubbish heap or was pawned by Napoleon's mom.

This half-forgotten fortress was constructed by the Ottoman conqueror of Constantinople.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

This statue celebrating everyday life in Dublin has a few unsavory nicknames.

The ruins of a medieval monastery named after a type of tree.

Edinburgh's oldest statue hides within a parking lot behind the city's iconic cathedral.

Touching this 18th-century Scottish philosopher’s toe allegedly conjures good fortune.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

Ancient human remains unearthed around the iconic monument.

Famously misunderstood wonder of the ancient world

This gem is often wrongly overshadowed by the larger, newer Metropolis church in Athens.

Legend says this sacred tree was a gift from goddess Athena.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

A small island with shimmering pink sands, home to loggerhead turtles and rare plants.

The medieval center of the Islamic world was also once the seat of Saladin's sultanate.

Charnel house at the foot of Mount Sinai.

The deadliest diving spot in the world is also a stunning geological marvel.

A long-buried ancient ruin unearthed right in the middle of the city.

A dead saint, a deadly poison, and a mysterious holy ooze.

Southern Italy's spinning top village.

People have been living in the cave houses on this Italian hillside since the Neolithic era.

Ancient snack bar of the Roman Empire re-opened.

Before it was buried by volcanic ash, this fast-food restaurant fed the hungry hordes of ancient Rome.

The walls and streets of the ancient city are peppered with penises.