A natural swimming pond is what you get when a hotel decides that a week of chlorine in a child's eyes is not the only way to run a summer. The water is filtered biologically, through gravel beds and planted zones, and it feels completely different to swim in: soft, cool, alive, with dragonflies over the surface and no chemical smell on your skin afterward. The hotels in this collection have built proper natural pools rather than a decorative water feature. Think a genuine regeneration zone doing the filtration work, water quality tested and published, a separate shallow area for small children with a gradual entry, and a swimming zone deep enough for adults to actually swim lengths in. The better properties heat the pond gently in shoulder season, which is the difference between a lovely idea and something you use in May. Austria, Bavaria, and South Tyrol lead here by a distance, where the natural swimming pond is a mature category and often sits alongside a conventional heated indoor pool for the days it is too cold. For families who care about what their kids are swimming in, this is the single most distinctive water feature in the collection. Below are the top family hotels with a natural swimming pond, sorted by overall score.