submerged ancient city - surreal underwater ruins beneath crystal waters, ideal for fantasy and historical s

submerged city underwater ruins ancient surreal landscape crystal waters historical fantasy background mystical architecture digital art photorealistic world lost design scene mysterious photography history ocean floor civilization illustration exploration deep sea aquatic ethereal relics dreamlike oceanic empire wallpaper poster textile notebook cover wall print event decor halloween day historyinspired archaeological holiday ambient setting magical depths dreamscape sunken decoration