The new gym is part of the historic Match Ball Firenze Country Club, which over the years has become a well equipped park dedicated to sport and leisure, overlooking the Arno River in the town of Bagno a Ripoli. Surrounded by olive groves, cypresses and tall trees, the gym is conceived as a crystal volume, with simple and rigorous geometry, composed of a punctiform structure in Corten steel and large transparent windows that allow the interpenetration of the external and internal spaces. The aim of the project concept that lies at the base of the work, is in fact to dematerialise the perimeter casing allowing users to perform sports and training activities in a space equipped with all the comforts despite being immersed in the green of the surrounding park. Simple lines, rigorous forms, use of Corten steel with a naturally oxidised surface integrates well with the landscape and the trunks of the surrounding trees. The use of steel technology allows the building to be completely dismantled and recyclable according to the highest international eco-sustainability standards for new buildings.