Hundreds of lucky felines haunt the ruins where Caesar was murdered.

A collection of objects supposedly singed by the hands of souls in purgatory.

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

Brass cobblestones mark the places where individual Holocaust victims were taken from their homes.

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

The mystic whose incorrupt corpse still attracts the faithful.

The remains of this 2nd-century Roman temple are incorporated into a modern building.

This curious, round temple is the oldest still-standing marble building in Rome.

An ancient Roman temple first dedicated to an emperor's wife is now a church.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

Romans decided this 16th-century "talking statue" was so ugly, they named it after a primate.

This large, circular tomb is the final resting place of the first emperor of Rome.

This former Roman Catholic Church still contains the embalmed hearts and organs of 22 popes.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

This medieval tower is all that remains of the castle where Joan of Arc was held before being burned at the stake.

Once a 19th-century brasserie, this McDonald's exterior celebrates Alsatian design and the "King of Beer."

The celebrated eyesore created by starry-eyed sweethearts.

This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

The video game-themed street art first popped up in the French city.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

A book bound in the skin of an infamous criminal, along with countless other specimens.

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

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