Fort De La Chartreuse is an abandoned site in the province of Liège, Belgium, featuring a collection of dilapidated brick and concrete structures. The location contains several buildings with arched windows, large arched doorways, and long, narrow hallways with concrete or brick floors. Many of the structures are in a state of significant decay, characterized by peeling paint, bare bricks, broken boards, and at least one large hole in a roof. Some windows are boarded up, and parts of the site are overgrown with bushes and trees. The interior features include concrete staircases and stairwells covered in dirt and debris, as well as doors that appear locked or barred. The site also contains various stone and brick tunnels, one of which has a rusted metal gate at the entrance. Extensive graffiti in colors such as green, blue, pink, yellow, white, and black covers the walls, archways, and tunnels. Specific markings include the phrase "Manen Van de Daar," the letters "U," "V," and "BLO," a red cross, and a yellow smiley face sign. The floors throughout the location are frequently covered in debris, dirt, and rubble.