The artwork "Ronja" by Renée Levi, installed in 2024, transforms the functional space of the Hallenbad Rialto's learning pool into an immersive, sensory environment. Located in the basement, the work envelops the area with a geometric pattern of glass-ceramic tiles in aquamarine, turquoise, and iridescent brown. This intervention goes beyond mere wall decoration by integrating six angular pillars into the design, effectively turning architectural supports into sculptural elements. The result is a luminous grotto where light, color, and the water's reflections interact, creating a dynamic spectacle that alters the perception of the entire room. This fusion of art and architecture demonstrates how public art can redefine everyday civic spaces, offering not just visual interest but a complete atmospheric experience that elevates a simple swimming lesson into a moment of aesthetic encounter.