Meet your guide outside Notre Dame just in front of the green statue of King Charlemagne. After a brief introduction about the dark side of Paris you will make your way to the very tip of the island where you will see Paris’ oldest bridge, the Pont Neuf, which required a lot of blood, sweat, and tears to construct. Cross over to the right bank where you will hear about one of Paris’ most notorious serial killers as you meander through some of the medieval streets. You will eventually stumble upon the former site of the oldest cemetery in Paris, the oldest hospital, before making your way to Hotel de Ville where public executions used to take place.