This is a private railway running from Digne to Nice through the department of Alpes-de-Haute-Provence. It is a line of terrific scenery and connects small towns and villages ideal for walking. The mountains tend to be extraordinarily steep at the bottom so that it as well to find established tracks. Gorges are a major feature of the walks where forests of chestnut are suddenly interrupted by flowering cherries and other signs of deserted hamlets.

http://www.beyond.fr/travel/railpignes.html