From 1730 to 1748 the community of Gan, convinced of the therapeutic virtues of the waters of the Broca, began a series of requests to the Parliament of Navarre. Between critics and virtues, the waters of Gan had a certain reputation in the 18th century. They were ultimately little used and, despite the renting and the construction of an annex housing 4 baths, the traces of which can still be seen on the left, they fell into oblivion before the end of the 2nd World War. It will take half a century for us to be interested in it again. In the 20th century, they will take the name of "Roman Baths".