Don't these look awesome?!
I just came across these today. I would very much like to eventually have a pool and watergarden, and this "new" pool system combines them both into one. They use plants as the filtration instead of chemicals, so there's no chlorine. As long as there's a natural balance, the waster stays clean and clear. Your "pool" can be home to plants, amphibians, ducks, and dragonflies.
According to Mother Earth Magazine, a dedicated team of do-it-yourselfers can create a pool for approximately $2000. When can we start digging??