Fantasy, thalassic, underwater, mythical, ancient ruins, mysterious, abandoned, Atlantis-like cityscape, intricate stone carvings, seaweed-covered columns, giant clamshell gates, majestic mermaid statue, shimmering aquamarine water, soft blue-green lighting, schools of small fish swimming by, sunken treasure chests, coral reefs, ocean floor, misty atmosphere, cinematic composition, dramatic low-angle shot.