The project consists of a double helical staircase in the middle of the space. The narrowness of the street and the location of the installation create an urban tension and compel the visitor to choose: to bypass or to penetrate the tower. If he enters it, he is greeted by a staircase. The visitor has to follow the steps that will bring him 4.6 meters higher on a narrow footbridge. After having taken a selfie, the visitor continues his visit down the stairs and finds himself on the other side.