Officially called la Fontaine d’Eau Thermale— the “Hot Water Fountain”— this fountain in the middle of Cours Mirabeau in Aix-en-Provence is popularly called Moussue, or “Mossy.” It dates from 1734.
35-degree water from a natural hot spring emerges at the top of the fountain. The Romans may have been right in attributing medicinal properties to this water, since the moss looks so healthy. Somewhere underneath the moss is a typical baroque-style sculpture featuring four cherubs. But at some point someone decided the fountain looked better with the moss, and stopped cleaning it.