In a mesmerizing underwater scene, an ancient city of merfolk thrives beneath the ocean waves. The city is illuminated by glowing corals and bioluminescent sea life, with intricate architecture resembling ancient temples and palaces. Merfolk swim gracefully among the structures, their tails shimmering with vibrant colors. The detailed depiction of the underwater world and the ethereal beauty of the merfolk create a captivating, otherworldly atmosphere.