Here's a "grow-your-own fence" - the pollarded willows not only supply the withes, they're also the fence posts at Appeltern Gardens -- BelleWood-Gardens - Diary - Love the idea of the living fence posts!
Eco-Friendly Natural Swimming Pools Natural pools eliminate harsh chemicals like chlorine by combining the cleaning properties of plants with bio-filtration and skimming systems. The pools are separated into two zones the plant zone and the swimming zone.
I like use of rocks gravel to slow water down as it moves through landscape on slight slope. Flat stone with depression in foreground a perfect spot for bees & butterflies to get water (without drowning in a deeper birdbath)