Over the River is a yet-unrealized massive earth-and-water work by the famous large-scale installation artists Christo and Jeanne-Claude. The plan and effect: giant pieces of material will be suspended over a moving river creating a play of light, shadow and transparency both for those viewing it from above as well as those traveling on or alongside the river below. As with all of their other works the artists will fund the project themselves with the scale of sketches, drawings and designs done ahead of time. (Source)