The blackthorn bundles (Schlehenbündel) require replacement approximately every 5 to 10 years due to the mineral calcification process.
The structure functions as a natural aerosol generator that creates a microclimate with humidity levels similar to the North Sea.
Saltwater is pumped from the town's underground 'Schönbornsprudel' source to the top of the tower for the evaporation process.
The graduation tower was originally part of a larger industrial effort to refine salt before the town transitioned fully to a health-focused spa destination.
The wood frame is constructed from oak, chosen for its durability against the constant moisture of the brine.
The Gradierbau in Bad Kissingen is a historic saline inhalation facility constructed to concentrate brine for salt production. Originally built in the 18th century, the structure features massive walls of blackthorn brushwood through which saline water is pumped. As the brine trickles down the brushwood, it evaporates to increase the mineral concentration and creates a fine mist of saltwater particles in the surrounding air. This process mimics the therapeutic environment of a coastal climate, often referred to as an outdoor inhalatorium. Visitors walk along the structure to inhale the salt-enriched air, which is traditionally used to assist with respiratory ailments and improve lung function. The facility is a functional piece of industrial heritage set within the town's expansive spa park landscape.
From the park pathways looking up at the wooden timber frame against the sky, or from the profile side where the brine flow is visible.
Walk the entire length of the structure to experience varying degrees of mist and breeze.
Wear a light jacket even on sunny days, as the evaporation process can make the immediate vicinity feel cooler than the surrounding park.
Inhale slowly and deeply as you walk to maximize the absorption of the mineral-rich air.
Avoid touching the blackthorn branches, as they are often sharp and encrusted with crystallized salt.
The brine pumps typically operate during the warmer spring, summer, and early autumn months; the facility is generally not active during freezing winter conditions.
Maintain a quiet volume; this is considered a place of health and relaxation.
