The Kaiser Center's Secret Garden

This secret garden lies in Oakland California on top of the a 5 level car part adjacent to the 28 floor Kaiser Center.
The garden has  a large pond, wooden bridge, lawns, and a bunch of trees and flowers.
It was designed by architect, Theodore Osmundson.
It was completed in 1960.
It was the first roof top garden, built in the United States, since World War II.
It is 40,000 sq. feet and open to the public.
It can be rented for special events.
It has concerts on Fridays, between noon and 1p.m. and are free.