Viewpoint from Roche Bernard

Like other Jura peat bogs, those of the Les Mortes and Bellefontaine lakes are a testament to the glacier that covered the Jura twenty thousand years ago and that left in its wake impervious moraines. These impervious depressions filled with stagnant water and were populated by plants. On the soft soil of the peat bogs grow some plants that are particularly suited to this environment (Cranberry, bog-rosemary, cotton grass, Drosera, etc.).