With a view to minimizing the visual impact of the pavilions, the façade features holes pierced onto 3,000 molten aluminum panels covering the fronts and mimicking erosion holes on the rock with vegetation overhanging out of them, creating a vegetation layer that mutes in step with the seasons of the year. Its transitional location between town and country provides the backdrop for its porous façade dotted with vegetation pouring out like a skin for the hill Urgull. In addition, the holes not hosting vegetation allow for natural lighting that illuminates the interior, letting light shafts and shadows in its rooms. By contrast, during night they allow for artificial lighting projected to the outside. The masterminds behind this design are Leopoldo Ferran and Agustina Otero.