Floor plan of a castle by the sea with stunning coastal architecture, incorporating elements such as arches, towers, and ramparts. The castle should be located on a solid foundation with easy access to the ocean for its unique feature - underwater chambers. These chambers can be used for storage, research, or even as living quarters for underwater creatures. Ensure the structural integrity of the chambers and provide proper ventilation and lighting. Protect the castle from tidal waves and storms with high walls, reinforced seawalls, and breakwaters. Ensure easy access to the castle from both the shore and boats with docks and bridges. | Anything