This legendary city has been a tourist attraction for centuries.

The hallucinogenic center of the ancient world.

This museum preserves the hand-dug tunnel that kept Sarajevo afloat during the Serbian siege.

Bridge that died in war and was resurected.

This one-time health resort was used by aristocrats around the world.

Italian poet Dante Alighieri is entombed in this small mausoleum in Ravenna, and his hometown of Florence has never been too happy about it.

Ancient snack bar of the Roman Empire re-opened.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

Erotic art covers the walls of the largest ancient pleasure palace.

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

Stone memorial that's said to predict the death of the pope and the site of the Cadaver Synod.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

Christ's blood preserved in a Belgian town.

A little sculpture with a large wardrobe.

Cozy basement bar sports an inventory of over 2,000 beers.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

The celebrated eyesore created by starry-eyed sweethearts.

The handiwork of a underdog clockmaker who solved an impossible problem for an Empire, and forever revolutionized seafaring.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

The television series' iconic giant foot was borrowed from this classical painting.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

This evocative New Jersey statue memoralizes the Polish victims of a Soviet massacre.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.