River Cruise "Tour of 7 Lakes": From Wannsee to Potsdam. Highlights: Wannsee, Babelsberg Palace, Glienicke Bridge, Glienicke Hunting Lodge, Cecilienhof Palace, and more. Length: 2 hours. Cost: €18.90. Info & Booking. The "Historic City Cruise" presents many major sights along the River Spree between the Reichstag and Nicholas' Quarter. more