Long a beachgoing destination for Berliners, the Wannsee's beach is a hefty one, with a view across to the beautiful pine-forest surroundings and, still, that darn TV-tower rising above it all. Although it isn't far out of the city, it requires a trek to get there. Once arrived, however, you'll be treated to a the largest amount of recreational activities offered by any lake, including the nude and cruise ones (just look for the lingering, incorrigible eyes in the FKK section).