Roof Garden @ California Academy of Sciences
One of the other most popular landmarks in the city, the California Academy of Sciences is one of those must-visit places for young & old alike. The roof garden (called the Living Roof)
has weather stations on that monitor wind, rain, and changes in temperature to help inform the building's automated systems and skylights.
It is apparently built with solar panels and the roof's seven hills are lined with 50,000 porous, biodegradable vegetation trays made from tree sap and coconut husks. An estimated 1.7 million plants fill the trays, their roots interlocking to create an extraordinary oasis for birds, insects, people, and other creatures (source: CAS website)