An hour-long journey in total darkness, turning a simple walk in a garden or sipping a cup of coffee into an extraordinary experience. Those who have made it say that they have experienced something unique, that has changed their way of thinking. Dialogo nel Buio (Dialogue in the Darkness) is an exhibition/percourse set up since December 2005 at the Istituto dei Ciechi in Milan. It differs from a traditional exhibition for the total absence of light and for the fact that visitors to explore the environments must rely exclusively on the senses of touch, hearing, smell, taste. For children are active sensory laboratories and experiences to live with their class.