They searched for and found treasures all over Ukraine - on the surface of the ground and beneath it. Now it's time for an underwater adventures. In the Crimea, on the dark bottom of a mysterious bay, lies the 'Catfish' - one of the first submarines of the Ukrainian Black Sea Fleet. Almost a hundred years ago, it was flooded by the crew to prevent it from geting to the hands of the young Ukrainian state's enemies. Skryť popis