landscape of a haunted castle and bats flying in the night sky. halloween background. halloween concept. generative ai.

halloween haunted castle moon silhouette forest lake scary moonlight celebration atmospheric full horror illustration concept spooky decoration landscape seasonal grave design cobweb ghost autumn holiday fantasy tombstone witch cartoon background fog creepy october bat night dark old eerie spider pumpkin skeleton mysterious fall halloween haunted clastle moon forest bat moonlight concept mysterious horror spider design generative ai