The River Verdon is a tributary of the River Durance. Along its 175 kilometer route it has dug a huge canyon into the Alps which is the deepest valley in Europe and one of its most impressive natural wonders. The canyon is 21 km long, 700 m high and only 6 m wide in some places. It represents a constant challenge for climbers, white water rafters and well-equipped hikers. There is a road around the edge of the gorge which leads to splendid viewpoints.