Châlons-en-Champagne, a city in the Marne department of France, boasts a rich history and a plethora of hidden gems waiting to be discovered. The city's urban exploration (urbex) scene is thriving, with numerous abandoned buildings and forgotten corners waiting to be explored. From the eerie, crumbling ruins of ancient castles to the colorful, street art-adorned walls of abandoned factories, Châlons-en-Champagne's urbex spots offer a unique glimpse into the city's past and present.