To escape forest fires they enter a volcanic cavern 

Henry Darger was an American artist who is best known for his "Vivian Girls" series, a fantastical and allegorical narrative that he created in the form of drawings, paintings, and writings. His works are characterized by their unique visual style, vivid colors, and intricate details, and they often depict scenes of violence, fantasy, and the supernatural. This artwork, "To escape forest fires they enter a volcanic cavern," is a good example of Darger's artistic style, with its blend of realism and fantasy, and its depiction of a dramatic and apocalyptic scene. The work's narrative details remain unclear, adding to its mysterious appeal.