Pool Fountains - If you're putting in a pool, consider a saltwater chlorination system. It can be more expensive to install but cheaper to maintain. And the water feels great- no chemical smell, stinging eyes, or green hair.
The plunge pool is a proper organic pool (natural swimming pool), only smaller. And this one is small enough to fit in a modest garden to bring the delights of plunging into organic water to more of us. (Click image for FAQs & instruction for making one.)