Lake Brenets, a long, winding lake on the Swiss-French border, is all but drained and has been unnavigable for more than a week amid a prolonged drought that has hit waterways across Europe.
The lake is normally thronged with campers, swimmers and canoeists in the summer, while three boat companies typically ferry thousands of tourists across it each season.
But this year it is virtually deserted as water levels in the River Doubs, which feeds it, have fallen sharply following months of scant rainfall and three successive heatwaves, the latest of which is still under way.