Visiting Potsdam and the Sanssouci Palace in Berlin, Germany: Part 4

On my last full day in Berlin, I signed up for a far happier tour than of the previous day: Sanssouci Palace and Potsdam. Our first stop after about an hour on the train from Berlin was Potsdam. Potsdam was a planned city where the Prussian kings and German Kaiser lived until the early 20th century.