Are you sick of trying to explain to your friends who don't live in Berlin what it means when you say the roughly 800-year-old city has an unfinished quality, an appealing roughness around the edges? Me neither. I love to talk about it. But in case you need a visual aid, just direct them to this photo of the enormous desert/vacant lot in front of the shiny, brand-new Hauptbahnhof, symbol of the capital's rise to European prominence. Well, maybe one day.