Be sure to be there before 9 o'clock, then you have a wonderful view of the Piton des Neige (highest mountain on La Réunion) and on Cilaos. At noon, like everywhere else in Reunion, clouds often gather.
Super view of the "Cirque de Cilaos", which can also be easily reached by car. Recommended to leave early in the morning to find clear, around noon it always clouds.