Maremma is plain region between the Tuscan coast and the surrounding hills covered with macchia mediterranea. None of the plains of Maremma were there in the Quaternario period. The plains have been created later by the flods of the rivers.

The production area of the IGT Maremma Toscana is instead a much small region that has the same borthers of the Grosseto province. Quality vineyards flourish along the hilly amphitheatre surrounding the ancient costal lake Prelius.