Natural swimming pools (NSPs) are a way to blend the sustainability and natural beauty of a pond with the functionality of a swimming pool.
NSPs use biological filtration in lieu of the more common chemical or chlorine water cleaning systems used in most artificial swimming pools.
The pools generally consist of a swimming area and a filtration area which can interact and be visible as much or as little as the designer wishes.
The pools have a tendency to look more natural than completely artificial pools but can be made to look extremely contemporary as is evidenced in the images below.