Rainy summer holidays

This year we decided - for the first time - to stay in Germany for summer holidays. I guess this won't happen again any time soon ...
Despite the bad weather, we spent some nice days in Potsdam, Berlin and Rheinsberg. Rheinsberg has a small castle and park with open-air opera performances during summer. As you can guess from the dark clouds on the day of our visit, the performance was not-so-open-air for us.