Beschreibung
To the north-east of the Winterplatz, the terrain falls away steeply for 60 m and forms the Brunnental valley with the opposite slope, through which the Äschersbach stream has dug its bed. Clear spring water gushes up from many underground basalt fissures, which collects in two ponds and downstream once powered the fountain art in the valley, the pumping station for pumping drinking water into the town and, further downstream, the Mühle zum heiligen Born, the town mill and the stone mill. Spring water has been drawn from the Brunnental valley since 1419. Grünberg owes today's Brunnental recreational area to the Grünberg Tourist Association, which began to lay out paths in 1901 and in 1908 purchased land on the opposite side of the town, which was made accessible by paths.