The Eugénie "buvette", which lies in the heart of the spa grounds, was built in 1913 in honour of the empress who came here with Napoleon III in 1862. The elaborate fountain is depicted by mosaics, glass and copper in a style characteristic of spa resorts of the period. The water is only to be drunk on prescription! Opposite, the spa facilities (1836) are reminiscent of the Roman emperor Constantin's basilica. In the hall, note the painted vaults, floor and the stained glass.