Untitled AI art by @gentle-palm4

Drawing in black and white of a gigantic cavern with a large central underground lake. There are wide strips of land between the edges of the lake and the walls of the cavern, with some constructions and cultures. In the center of the lake, there is a round island. In the center of the island, there is a gigantic round stone column that disappears into the ceiling of the cavern. Four passenger ferries arranged at 90 degrees to each other connect the edges of the lake to the central island.