A natural swimming pond can definitely have a waterfall, and it can actually be a great and helpful addition. A waterfall helps with water circulation, which is important for keeping the water fresh and clear by promoting oxygen flow throughout the pond. It also adds a calming, aesthetic element to the space, making the pond feel more like a natural oasis.
As long as the waterfall is designed to maintain the balance of the pond’s ecosystem and doesn’t disturb the water quality, it can be a beautiful and functional feature. Just be sure to consider the pond’s size and filtration system to make sure the waterfall doesn’t overwhelm the space or cause water loss over time.