Save Sensitive Natural Area, étangs de Passins lakes sector

Today, following the re-routing of the Save and the industrial exploitation of peat for horticulture, the swamp disappeared, giving way to a succession of lakes on both sides of the Save.

There are more than 745 species surveyed, some with strong heritage value, like the Purple Heron (Ardea purpurea), the Least bur-reed (Sparganium minimum), and the European pond turtle (Emys orbicularis).

The landscape is marked by its geological history. One of its peculiarities is the presence in a same place of a rocky outcrop polished and streaked by the Würm glacier, of moraine deposits and of ancient peat, which allow the history of the last glaciation to be traced.