The extensive green roof system requires low maintenance and is able to run on very little water. It is also able to withstand harsh environments. The plants used are called seedum plants and they are particularly popular in green room systems.
Building 92 was listed as a historical monument. Although they have modernized one half with a glass exterior, this side has preserved its original architect.
This part of the yard provided a nice view of the NYC skylines. The round black balls have hundreds of oysters under them. The oysters are used to filter the water that comes out of the sewage system.