Dark scene below Paris

A special feature is that the "ghost stations" that were in operation but abandoned since World War II, such as Saint-Martin, still retain their nostalgic charm with classic advertisements. Although no longer in operation, travelers on the Métro can still see something mysterious. Inside the locked doors, the corridors still retain the nostalgic look of the post-war period. Sometimes, these abandoned stations are used as a gallery to experiment with different advertising formats, brightening up the gloomy space under Paris.

Source: https://baohaiduong.vn/canh-tam-toi-ben-duoi-paris-392733.html