The water falling is a made out of a sequence of images mapped against the rocks (see wireframe). The water and other elements loops perfeclty after 300 frames.
You can download both the VRAY and SCANLINE version of the scene. Please beware that the images were produced with the Vray setup.
The scene is relativelly heavy. But you can delete parts of it depending on the viewing distance. (Ivy branches for example are made out of more than 2 million polygons.) Alternativelly I would recommend to use Vray-proxy if you intended to merge it in a larger scene.