The Rhine Falls (Rheinfall in German) are the largest plain waterfalls in Europe.
The falls are located on the High Rhine between the municipalities of Neuhausen am Rheinfall and Laufen-Uhwiesen, near the town of Schaffhausen in northern Switzerland, between the cantons of Schaffhausen and Zürich. They are 150 m wide and 23 m high. In the winter months, the average water flow is 250 m³/s, while in the summer, the average water flow is 700 m³/s. The highest flow ever measured was 1,250 m³/s in 1965; and the lowest, 95 m³/s in 1921.
The falls cannot be climbed by fish, except by eels that are able to worm their way up over the rocks.
Source: en.wikipedia.org/wiki/Rhine_Falls - 03.06.2010
A crass contrast: water rushing over with many turbulences
immobile hard rock,
but yet they are both the habitat where the grass can grow and exist.