Roger Waters' tour-closing gig in Quebec City, Quebec promises to showcase the largest wall ever constructed for his live show. The just-announced July 21st concert at Fields of Abraham will be the last of Waters' two-year tour behind The Wall and will measure more than 250 meters in size, according to Pollstar.com. The Quebec City date will have extra pyrotechnics and lights and marks only the second occasion that The Wall has been presented outdoors on this scale since Waters' historic 1990 performance at the Berlin Wall.