Cathedral below

A small submersible with two warm searchlights glides through the immense doorway of an abandoned stone cathedral deep underwater. Its beams sweep across suspended sediment and towering carved pillars while a school of tiny silver fish parts ahead. The camera follows from a low rear angle, emphasizing monumental scale and rich cobalt darkness. Underwater adventure-film photography, restrained lens bloom, sonar pulse and muffled hull vibration. No letters or cuts.