In an attempt to add dynamism back to the sometimes-dreary museum experience – and to capture the hearts of a younger audience – Cai Guo-Qiang introduced a real flowing river into the Guggenheim museum as part of a larger-scale series of installations. While other aspects of his work are also impressive there is something fundamentally compelling about transforming the experience of a museum so fundamentally – introducing one of the last things one would expect (an essentially real flowing river) into a place normally typified by order and control. (Source)