Lons-le-Saunier

The town is in the heart of the Revermont region, at the foot of the first plateau of the Jura massif. The Jura escarpment extends to the east and south, while to the west lies the plain of Bresse and to the north extensive vineyards.
The River Vallière runs through the town, rising in a typical Jura blind valley not far away, at Revigny. It has been conduited since the 1960s on grounds of hygiene, since sewage outlets run into it. A small section remains in the open air near the parc des Bains, and only a single bridge remains.

Wikipedia