Reflected Sky in Tailings Pond. Northern Alberta. Canada. 2010. Disguised by the beauty of a reflection, these toxic tailings ponds are a considerable health risk. These vast toxic lakes are completely unlined and nearly a dozen of them lie on either side of the Athabasca River. Individual ponds can range in size up to 8,850 acres. Nikon D3 70-200mm f2.8 shot at 190mm, ISO 800, 1/1600 at f4.5 Alberta Tar Sands, Northern Alberta, Canada.