Atlantis.
At that moment, Watson was strolling in the underwater kingdom. Even though it was called a kingdom, Atlantis was only a little larger than the Floating City of Stanley. It was different from the buildings on the surface. Its architecture had an ancient style; it was similar to a temple. The pillars outside the temple were covered with glowing seaweed and corals that were unique to the ocean.
The buildings in the entire kingdom were arranged in a ring-shaped ladder. However, that ladder did not go upward but downward. An altar in the center, pulled by eight iron cables dozens of meters thick, had a bottomless abyss beneath it. Occasionally, colorful bubbles would appear from the abyss—it was astonishingly beautiful.
"That is the city where the sea folks live—Atlantis. Compared to the cities on land, it is unique, indeed."
Watson stared at the buildings and sighed.