In contrast to the sulfur spring, known for its typical smell, the iron spring was characterized by its iron-rich taste. The iron in the water comes from the geological composition of the area: the water flows through iron-rich rock layers, where it becomes enriched with this element and is thus classified as sulfate-, iron-, and lightly mineral-rich water. The water here emerges at a
temperature of about 6.5°C. This iron spring was almost completely buried by a rockslide at the turn of the millennium and was recaptured by the Office of Nature in 2024 and brought near the Kneipp facility in Ratzes.