From time immemorial, we have been bathing in streams and rivers, such as the Seine or the Marne, which flow through our region. When converting the Léopold Bellan gymnasium into a municipal aquatic centre, the Marne was an obvious and natural guiding principle for our project. Beloved by the residents of Bry-sur-Marne, its proximity to the future venue allowed us to design a place dedicated to multiple kinds of bathing, combining leisure and well-being. Presented here through capillarity, the Marne is gradually introduced into different spaces, creating a strong connection between the user and the water. An emphasis will be placed on a rich colour palette and effects of transparency and opacity, in tribute to the colours of this water course so emblematic to the region.