A certain anthropologist encouraged us to visit the Catacombs of Paris, and we were stunned by the walls of bones. In a decades-long project, more than six million remains were moved to caverns under the city.
I’m not sure I was really prepared to come face-to-face with so many skulls.
Decaseconds 
[…] homogeneity of Parisian streets seemed a little bit anomalous to me until I visited the Catacombs and came to realize that much of the stone making up the city had been quarried from directly […]