Nickenich
"Sauerbrunnen" or "Sauerlinge" are carbon dioxide-containing sources typical for regions with volcanic activity that have been used since time immemorial.
The fountain in Nickenich is also popularly called "Brünnchen".
Sauerbrunnen "Brünnchen"
GPS Koordinaten N50°24’47“ E 07°18’59“
Nickenich