The National Domain of Saint-Cloud presents its legendary ‘Jeux d’eau’ water shows which activate the historic fountains and cascades of the former royal estate. Tracing its origins to the park was designed by Le Nôtre and its hydraulic systems represent the peak of 17th-century engineering in the Île-de-France region. The event highlights the regional identity of Hauts-de-Seine as a guardian of the grand classical style and royal landscape traditions. Visitors can witness the activation of massive water sculptures and jets that have remained functional for over three hundred years. This program has a profound social impact by offering a grand-scale free public performance that celebrates the region’s technical and artistic history. For engineering researchers it delivered a unique opportunity to observe the operation of a massive historic gravity-fed water network. The water games ensure the legacy of the ‘Grand Cascades’ is shared and protected for the future generations of residents.