If you enter creative and go into the island with caves empty, and head to the far side of the map, where the cave has water in it, it will make you swim. But if you fly above the water, you cannot see the water.
If you enter creative and go into the island with caves empty, and head to the far side of the map, where the cave has water in it, it will make you swim. But if you fly above the water, you cannot see the water.