The elevated bridge is awesome. I wonder how you do that.

I have a question, what approach do you take to make the room next to the pool that has window looking right into the water of the pool, like an aquarium. I have tried that with the usual method of lowering and flattening the ground as most would do for a basement. But my problem is, while making an underwater basement, only the front and right side actually submerge the windows. The left and back side of the wall has water fall effect: Water level actually curves down to the bottom of the window. This looks very odd. Do you have any trick to force any given water level straight, to ensure that it submerges correctly?