In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

An ancient burial ground believed to have been used for ritual sacrifice.

The hallucinogenic center of the ancient world.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

2300-year-old Roman road connecting the empire.

Secret refuge and museum of the Duke of Florence.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

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

An all-American grocery store in Paris sells U.S. "cuisine" like Pop-Tarts and Heinz ketchup to homesick ex-pats.

The celebrated eyesore created by starry-eyed sweethearts.

Ordinary art transforms to extraordinary thanks to locals' quirky sense of humor.

This bridge was constructed from the rubble of the infamous Bastille.

The Argonaute submarine was the French navy's pride and joy in the 1950's.

A series of abstract, silly sculptures represent the works of a great modern classical composer.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

In this Parisian garden's grotesque former life as a zoo it fed exotic animals to the bourgeois and put humans on exhibit.

Museum on French naval history, with magnificent figureheads, a historic diving suit, and a boat used by Napoleon.

This Paris art space celebrates the creativity and ingenuity that springs from abject poverty, especially in Africa.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

Noirish green neon marks the location of one of the oldest private detective agencies in France.

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

Natural history museum celebrating biodiversity with a parade of taxidermy animals.

The first green space constructed on an elevated viaduct.

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