One group was taken to the Audi factory to see how the company makes its cars. Interesting for car lovers but not my scene. A second group did a 30 km bike ride. Interesting scenery but I'm not fit enough. Third group was taken on a walking tour of the old city. That sounds like me and off I went.
A fantastic Catholic Cathedral dating from the 7th Century but I was especially taken with the interesting array of public clocks.
A few examples follow: