mysterious underwater city ruins ancient architecture submerged under the ocean, sunlight rays piercing through water, enigmatic

lost mysterious rays underwater discovery exploration aquatic deep marine site heritage hidden coral sunlight abyss civilization submerged history preservation structures antiquity ruins ocean archaeological artifact biodiversity forgotten aquamarine enigmatic sanctuary beauty water sea ancient architecture city ancientcivilization aquascape deepsea depths marineecology mystique oceanfloor relics seafloor spectral underwaterexploration wondrous