The Crocker Galleria is a privately owned public open space (POPOS). Built in 1982, it is an example of San Francisco requiring builders of tall buildings to provide places for relaxation open to the public. The bigger the building, the bigger the POPOS. For lots of info, including a map of their locations, visit the city's planning website
This one is in the form of a mall with casual food service on the first and third floors and retail on the second. It also features two roof terraces reached by stairways from the top level. The glass roof, inspired by Bernini, lets the place feel like it's outdoors.
In years past it was a bustling spot for strolling, lunch, coffee, and resting downtown. A few years ago the take-out food vendors started closing. The pandemic has accelerated that trend. But it's still a magnificent spot for recreation.