Due to some awesome law, all of the large, privately owned buildings in Downtown SF need to provide a certain amount of space on their property that's open to the public. Most of them are just concrete courtyards or pedestrian walkways with benches, but a small handful are actually pretty awesome. Like, 15th-floor-rooftop-terrace awesome. We checked out all 50+ POPOS (Publicly Open Privately Owned Spaces), and narrowed it down to five that're actually worth checking out (four of which are obvi on rooftops).
Oh, and we've got a guide for how to find each, because weirdly, the privately owned buildings aren't super into publicizing directions.