The "Plongeoir", designed by Spray architecture is a hut placed in the middle of nature in eastern France. This ephemeral module of 14m square is an oblique you cross through a stepwell. Movements and perception of space are enriching the way of using it. "You don't just cross these steps but you live in." This construction meets simple needs such as shelter, contemplate, relax, exchange, appropriate space. Like a diving board, you go through the place to reach a platform overlooking the space and offers a view on the inside and the outside.