haunted gothic castle at night, old spooky citadel in fool moon, generative ai

castle old haunted moon dark medieval sky halloween night gothic background blue building chateau creepy dramatic europe fairy fairytale fantasy generative ghost gloomy hallowen helloween horror house light mansion midnight moonlight mystery mystic nightmare ominous palace scary shade shadow spooky tower twilight vintage wallpaper full view outdoor citadel fool ai castle scene theme terror concept