The tomb of history's greatest potato promoter is surrounded by tubers.

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

Montmartre's sole surviving windmill became an iconic landmark for 19th-century painters, artists, and bohemians.

One-time winter retreats of prolific inventor Thomas Edison and his friend Henry Ford.

Former utopian colony based on the belief that the universe exists in a hollow sphere.

In the early Roman Empire, people deemed traitors and criminals were tossed to their deaths from this rock.

Inside this McDonald's you can dine on your Big Mac and fries next to a 2,500-year-old Roman wall.

This ancient market is often referred to as the oldest shopping mall in the world.

This small church was constructed over the ruins of three temples dating to the Roman Republic.

The "Great Sewer" of ancient Rome is one of the oldest sewer systems in the world, and is still in use.

A burial vault located under Tiber Island in the middle of the Italian capital.

The only remaining arch of the oldest stone bridge in Rome stands in the middle of the Tiber.

This is the oldest Roman-made bridge in the city still existing in its original state.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

A dismembered holy head stares out from her beautiful reliquary at the St. Dominic Basilica.

First founded in 1472, this is the oldest bank in the world. Its history may explain why we call financial institutions "banks."

A slightly creepy gallery of plaster cast models in the same museum as Michelangelo's David.

Legend says this mysterious stone head belongs to a woman who was petrified by an alchemist.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

Where Venice's gondolas go for a tune-up.

As can be expected from a centuries-old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

The only museum with its curator—and her pets—buried inside.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.