The algae fountain with undrinkable water above a hidden WWII bunker hotel

How’s that for a blog title!

Here is an interesting fountain located in the Marktplatz in Stuttgart which, like most fountains in Germany but NO fountains in Switzerland, does not have drinkable water but which does, unlike most fountains in Germany, sports a jungle of algae:

But what a lot of people don’t know is that, deep under the Markplatz, there is a hotel, now closed, constructed from a World War II bunker.