It's a circuit full of contrasts that awaits you. Contrast between the wild verticality of the limestone cliffs of the high valley of the Tarn and the tender roundness of the plateau of Lévezou. Contrast between a land of stones, ravines and ewes and a land of green meadows and forests where cattle breeding predominates. Going up the course of the Tarn, as far as Aguessac, you may catch sight of one of the many paragliders, giant multicoloured butterflies, which animate the Millavois sky. Once past Aguessac, as you climb higher and higher, the landscape gradually changes. Let yourself be surprised by the special atmosphere of the high plateaus, those where the view is far away. Little by little, you will cross a frontier, invisible but very real. The one that marks the passage between the great Causses and the Lévezou plateaus. You will then walk through pastures, broom and forests. In Saint-Léons, a detour to the birthplace of Jean-Henri Fabre, the famous entomologist, or a visit to Micropolis, a town entirely dedicated to the world of insects, will surprise you! Afterwards, the long descent from the Col d'Engayresque to the upper Tarn valley will be gentle. It will allow you to penetrate step by step in this country of the Causses with the black earth ravines which all go down towards the Tarn. Sometimes calm, sometimes torrential, but a real Ariadne's thread that will lead you to Millau and its unmistakable Viaduct the highest in the world. From now on, pay attention to the countless orchards that brighten up the valley. Here the cherry will be queen. From Rivière-sur-Tarn to Paulhe, you will drive through a harmoniously worked landscape, in the very heart of the orchards that have made the reputation of the high valley of the Tarn. And when the cherry trees disappear from the landscape, it is only to make way for the vineyards of the Tarn coasts which, wherever they can, set out to conquer the steepest slopes.
