Generate an image of a sinister hospital, evoking a sense of darkness and foreboding. The hospital should be depicted as dilapidated and ominous, with crumbling walls, broken windows, and overgrown vegetation adding to its eerie appearance. Emphasize the desolation and decay of the abandoned hospital, with shadows cast by the moonlight or dim lighting creating a haunting ambiance. Surround the hospital with an atmosphere of gloom and unease, suggesting hidden horrors lurking within its forsaken halls. Utilize lighting and composition techniques to enhance the sinister atmosphere of the scene, evoking feelings of fear and apprehension in the viewer. The image should convey a sense of dread and mystery, hinting at the haunting secrets of the abandoned hospital waiting to be uncovered.