Kochbrunnen 
Description
A small park located over one of the main points where the hot springs that Wiesbaden sits over breaks the surface. There is a domed water house where you can sample the water - though it comes out at decent cup of coffee hot, so you'll want to use a cup, glass or bottle rather than your hands to sample. It's slightly sulphurous and not particularly pleasant. Nearby there is a fountain that the water gushes up through, creating clouds of steam and leaving an interesting mineral deposit on the slopes of the fountain making it look like a watery volcano. The effect is particularly noticeable at night and when the temperature is low.
Charge
Free
Getting There
Latitude: 50.08632; Longitude: 8.242188
What3Words: finally.cheat.guarded
