The Krimml Waterfall is an impressive natural spectacle. How the masses of water thunder down into the valley and the spray and mist rise upwards almost within reach. It is precisely in this fine mist that the secret of the healing effect of the Krimml Waterfall lies. The force of the waterfall literally shatters the individual water molecules into tiny fragments when they hit the rock. This creates negatively charged, nanometre-sized water fragments that can enter the lungs, the so-called nano- or waterfall aerosols. Due to their small size, they can penetrate particularly deeply into the respiratory tract and unfold their cleansing and immunomodulating effect there. Allergy and asthma symptoms disappear, the respiratory tract is cleansed and allergic inflammation is sustainably alleviated.