Untitled AI art by @gentle-palm4

Drawing in black and white of a gigantic cavern with a very large central underground lake. The lake is connected to a river coming from the front and living at the back of the cavern. There are lands between the edges of the lake and the walls of the cavern, with some short and grouped dwarven constructions against the walls of the cavern. In the center of the lake, there is a an island. In the center of the island, there is a gigantic natural round stone column that merges into the ceiling of the cavern. Four lower-middle age small passenger ferries arranged at 90 degrees to each other connect the edges of the lake to the central island. An entrance at the base of the central pillar gives access to a circular staircase climbing within the column.