Complying with the practical need of retaining stormwater on site, this stone fountain is conceived to reveal the presence of the vein of gravel - lying just underneath the site - brought to Milan 12’000 years ago by the melting glaciers, at the end of the last Ice Age. Designed as a crossover between lotus gardens and Japanese rock gardens, the concave surface of each circular stone retains a tiny layer of rainwater, both showing the falling reaindrops as well as reflecting light, as mirrors, when the rain stops.