What happened was that they used to shove straw in the hole to indicate that there was a fresh brew available.
Today, guides dressed as a "beer crier" will not only point them out to you but show you other historical sites of importance.
Sadly, the tour, if I have interpreted the brochure correctly, only occurs in German though my brochure, in English, states "Not available in other languages". Go figure.
I took the shot of the beer crier while eating at an upstairs restaurant in the Fischmarkt, listed as being in the centre of the city.


