This is a privately owned public open space (POPOS) at the corner of Second Street and Mission Street in San Francisco. It occupies most of the ground floor of a twenty-six-story office tower and is open during business hours for anyone to use.
POPOSs have been required by law since 1985 in all new buildings downtown and in adjacent neighborhoods. Along with requiring public open space proportional to the floor space of the building, the law requires a budget for public art equal to one percent of the total construction cost.
Just this morning, I wrote a scene set in the Greenhouse for Dark Video, the fourth Nicole Tang Noonan mystery, Nicole meets her friend, Irene Gonzalo, for lunch so they can compare notes on their investigations. Irene is Nicole's sidekick in this book, much the way Abbie is in the first three books.
If you're ever in town, it's fun to walk around to these. Some are indoors, some are outdoors. Some are street-level, some are rooftop. Here's a partial list.