Dark, eerie atmosphere, abandoned asylum, creepy corridors, flickering fluorescent lights, peeling walls, rusty medical equipment, old wheelchairs, mysterious shadows, ghostly apparitions, haunting whispers, eerie sound effects, misty fog, dimly lit rooms, broken dolls, shattered vases, cryptic symbols etched on walls, foreboding doorways, ominous portraits, cobweb-covered furniture, abandoned laboratories, sinister experimentation tables, grotesque creatures lurking in shadows, unsettling stillness, disturbing ambiance.