The source of the Doubs River is a powerful karst spring in a heavily karstified area of the Jura Mountains. It lies at an altitude of 937 meters at the …
Several million years ago, the Ain was lost underground, in a labyrinth of cavities, an underground gallery called "losses". Over time, the work of water erosion has done its work, …
This belvedere is installed just above the cliffs from which the waters of the Doubs flow.
On this promontory you can also admire the superb peat bogs of Mouthe in the background, and the forest of Haute-Joux in the background.
Nicknamed "Little Siberia", Mouthe is known for its freezing winter temperatures. It is also here that the Doubs river has its source. Located at the gates of the Jura Natural …
The Serpentine, (first tributary of the Ain river whose source is located a little higher) forms a small lake near the ruins of a mill. It is from a cornice …