A 200-year-old tavern challenges guests to finish a glass of wine while hanging from a ceiling beam.

This historic structure has been used as a mosque, a barracks, a prison, a school, and a bakery.

The ruined doorway is a portal to the building's turbulent and torturous past.

An ancient octagonal weather station named for the eight Greek gods of wind.

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

This small 16th-century church in Athens is almost entirely surrounded by a modern building.

Host to the annual Festival of the Snakes.

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

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

This seemingly random 30-foot statue of an oryx in Qatar's capital was a mascot for the 2006 Asian Games.

A state-of-the-art medical facility dedicated to treating beloved birds of prey.

This fountain pays homage to Qatar's history of pearling, the primary industry before oil.

Qatar's oldest market can trace its origins back more than a century.

Ghost stories surrounded this “castle,” the only structure from a huge mansion that was never built.

Nelson Mandela lived here with his family from 1946 until his arrest in 1962.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

Not truly a ship nor a building, the Navy's first and last "landship" is now abandoned due to clerical issues.

Peeing dogs guard the Roman hunting goddess atop a fountain at France’s Château de Fontainebleau.

The Lone Star plaque hangs in a bombed-out bunker in Normandy to honor a Texan colonel's heroic actions on D-Day.

A daring D-Day assault by U.S. Army Rangers is commemorated atop the high cliffs of this strategic point.

A memorial to the nearly 10,000 American soldiers laid to rest on the beaches of Normandy during WWII.

Bloodstains can still be seen in this medieval church where two medics saved lives on D-Day.

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

Legend has it the commander of the defenders drew a fateful line in the dirt with his sword just before the final battle.