green roof at \u201cthe gathering place\u201d, vancouver island university (nanaimo campus). the vagelos education center at columbia university interior view of the clyde and helen wu. baffling design ideas of rooftop garden with green grass and black alluring concrete walkway also curved . view of the green roof . ne columbia sunroom with complicated roof tie in. a view of the schuylkill river and the philadelphia art museum from the peco green roof. rooftop-haven.