What is "levezou"

The Lévézou is a geographical region in the Aveyron department in southern France. It is a impervious crystalline plateau with an average altitude of around 900m. Its highest point is Mont Seigne (1 128 m). Though its borders are not strictly defined, it is bounded in the south and east by the River Tarn and to the north by the Viaur. To the west it merges into the Ségala.