Bercy Chen Studio Austin Texas Here the water feature traverses the walkway in a planter treated like a lily pond. This photo illustrates that a strong sense of entry, a bridging of two zones, need not be literal.
An alternative to chlorine pools, the BioTop Natural Pools use plants to keep water clean and clear. Wikipedia has some more info on natural swimming pools as well. These could make a great addition to a permaculture design site.