The Ray-Pic waterfall is a natural waterfall and a natural volcanic site. The amazing rock formations of this 60-meter waterfall follow a lava flow that forms a cascade of basalt columns.
The Col du Gerbier de Jonc from Saint-Martin-de-Valamas is 22.9 km long with a total drop of 885 m. The average gradient is 3.8% with maximum gradients of 8.3%.