My city Jena
It is actually a spring which is the starting point of the stream called "Pennickenbach" and continues through Wöllnitz.
The fresh water can be drunk. It is a famous spot to take a rest because many ways are crossing here. So you are never alone in the middle of the forest.
It is called Fürstenbrunnen (means: fountain of the prince) because the prince Kurfürst Johann Friedrich was meeting his students here after beeing freed from prison.