Sion is surrounded by a sea of vineyards that laps against the slopes of the two rocky outcrops of Valère (also known as Valeria) and Tourbillon, each crowned with castles. The terraces of grapevines in the first section of this walk are among the steepest in the world. The route takes you along a picturesque old irrigation channel, known as a “Suone”, and through winemaking villages where you can enjoy tasting opportunities.