Our team developed a global development plan for the site of the Ouillon plateau (2100/2400 m altitude) with the idea of creating a real «4 seasons» attraction for the territory. In this dynamic of development we have designed and developed a «site house» with an emblematic architecture which finds all its relevance in its landscape integration: semi-buried and covered with a green roof. This principle allows to limit considerably its visual impact but to offer an exceptional relationship to the landscape. We have also developed a concept of unusual accommodation that allows to extend the length of stay on site and to offer a unique immersion in the landscape, «alone» facing the spectacles of dusk and dawn.