One of the most intriguing aspects of Naours is the extensive graffiti left by past inhabitants. These inscriptions range from simple names and dates to more elaborate carvings, providing a historical record of the city’s use over the centuries. The graffiti from World War I soldiers is particularly poignant, capturing the thoughts and emotions of young men facing the horrors of war.
The Underground City of Naours is home to around 3,200 WW1 graffiti. 1,800 are believed to be by Australian soldiers, others by English, Scottish, Irish, American or French soldiers.