A split-screen composition landscape photograph, cinematic style. The left half shows the glorious golden city of Atlantis above water under a bright sunny sky with futuristic flying vehicles. The right half shows the same city ruined and submerged deep underwater in dark blue water, covered in green algae and coral, with a small deep-sea diver swimming past a broken pillar. Dramatic lighting contrast between left and right, hyper-realistic, 8k.