If you have plans to visit Berlin, make sure you set aside a day to go to Potsdam. The palace is stunning, the park that it sits in is filled with amazing constructions (my favorite was the Chinese teahouse), and the town of Potsdam itself just begs to be explored. The Dutch quarter was very interesting and there were so many streets lined with unique little stores and cafes. I keep telling myself that I will go and spend a day or two just in Potsdam.
The article is about Potsdam being #8 on the UNESCO worlds list.