The Grande Grille gushes forth at a temperature of 40ºC, the Chomel at 41ºC and the Hôpital at 33ºC. The source du Parc and the source de Lucas are a mere 24ºC, while the Célestins spring is 21.5ºC. All six are harnessed in the glass and metal Hall des Sources, located in the Parc des Sources.