Over the course of 48 years, a total of 69 people were publicly executed by way of the Paris guillotine. And if you want to stand exactly where a 19th-century liberated French peasant stood when royal heads started to roll, all you have to do is go to Paris and take a stroll to Rue de la Croix-Faubin, where La Roquette Prison once stood. There, you can find five very distinct slabs of stone in an otherwise unremarkable road. These mark the spots where the guillotine's foundation was placed. Because old-timey streets weren't exactly flat, five heavy stones were pounded into the ground so that the guillotine could be placed on a perfectly level platform. Good for the guillotine, bad for all the convicts hoping for a last-minute Looney Tunes-like slide away from the blade.