Dignes-les-Bains
Dignes was a strategic site between Provence and the Alps and occupied throughout Antiquity. In the early 19th century Digne was a luncheon stop for Napoléon. Today it's a popular tourist stop, with only one of its attractions being the thermal baths that justify the -les-Bains part of its name.
It has 8 hot springs (and one cold), flowing from the St Pancarace cliffs. The water, starting at 42°C (107°F), contain sulfur, calcic (lime and calcium), strong minerals and are lightly radioactive.