Create a large circular water-based...

Create a large circular water-based city built entirely on the ocean, with multiple interconnected islands and canals instead of roads. The layout should be radial and symmetrical, centered around a main hub island. At the center, build a large circular stone island featuring a massive ancient tree rising upward. The tree should have thick roots merging into the island, with wooden platforms and structures built into the trunk and branches. Add waterfalls flowing from the central island and tree into the surrounding water, making it the main visual landmark and core base. Surround the hub with a wide circular canal for boat travel, and extend curved radial canals outward to several district islands. Each district should consist of wooden buildings on stilts, docks, bridges, and walkways