All of Chicago's wood-paved streets are long gone but two alleys remain.

The first plantation museum in the United States to focus on the lives of enslaved people.

The strikingly modern structure stands out among the brick buildings speckling the Harvard Business School's campus.

The second-largest gold nugget in existence, displayed in a Las Vegas casino conveniently named the Golden Nugget.

Formerly known as National D-Day Museum, this collection commemorates the battles of Normandy and WWII.

A collection of oddities including Dr. Kevorkian's suicide device, the Thanatron.

In 2010, Nicolas Cage purchased two plots in this cemetery using one to construct this strange pyramid mausoleum.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

The final resting place of New Orleans' most famous voodoo priestess.

A giant Troll lurks under one of Seattle's oldest bridges.

The oldest stone house in Paris was built by its most famous alchemist.

Despite being considered a thoroughly American sport, basketball's oldest surviving playing field is found in the basement of a Paris YMCA.

The Sun King's military models, saved from the Louvre.

This innocuous-seeming building is actually the remnant of a major wartime brothel.

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

An effigy of a trapped paratrooper dangles from a Normandy church to commemorate one remarkable D-Day event.

France's most famous cemetery, with some of its most curious tombs.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

A museum of magic with a Sadist past.

Remains of Roman amphitheater hidden in a sleepy quarter of Paris.

Paris' fabled purveyor of exotic taxidermy and natural history curios.

The ruins of a Duke's bucolic dream, where camels once roamed alongside "Dutch" windmills and faux-Italian vineyards.

The curious underground history of keeping Paris clean.