I went to Birmingham yesterday to specifically see this piece of work, and was lucky enough to meet the artist David Rowan who was tweaking the work only slightly. He gave me an insight into what was going on in the piece. A forgotten world of the underground rivers that are diverted under the city. In conjunction with ideas of Inca’s apocalypse legend. A really immersive piece thats almost meditative. check out his exhibition at Eastside Projects, just south of the Bullring.