Thursday. The day started by crossing the Glienicke Bridge which featured in spy swaps in the Cold War. Then we went to The Sanssouci Park and the Schloss Cecleinhof, where the Potsdam Conference took place in 1945. In the afternoon we walked in the footsteps of Jessie Owens and Usain Bolt at the Olympic Stadium and the day finished with a sombre trip to the Wannasee Villa, which is linked to the Nazis Final Solution. Home tomorrow.