Discovered in the 16th century but re-engineered for the 21st, the geothermal spring at Langenfeld (aqua-dome.at) has become an Alpine playground with a generous complex of indoor and outdoor pools.

The otherworldly contours of this ice chamber were formed by the heat of a geothermal spring.

Therefore it is concluded that the temperature of Spring 1 may be influenced by the temperature of the recharge water, rainfall and that of the geothermal;