This region occupies the area at the extreme south of the Italian peninsula, between the Tyrrheanian Sea and the Ionian Sea; it is almost exclusively a mountainous region with secondary and limited areas of level ground (the plains of Sibari, Sant'Eufemia and Gioia) which have assumed, however, through improvements (drainage and agricultural) particular economic significance. The Calabrian mountainous ridge, in the northern part, joins up again with the mountainous axis of the Italian peninsula, with the group of mount Pollino (2248 m. above sea-level). From mount Pollino, the coastal range of mountains branches out towards the South, displaced very much over towards the Tyrrheanian Sea. From this range, to the east, descends the river Crati and its many tributaries. This range extends for almost eighty kilometres, and between the range and the valley of the river Crati, rises the plateau of the Sila which is mostly formed by granite.
To the South of the Sila, the peninsula narrows drastically and so even the mountainous ridge subsides towards the two gulfs of Sant'Eufemia and Squillace permitting the opening up of two plains: to the East, the very narrow, coastal plain, overlooked by Catanzaro from its eminent position (350 metres) and to the West the fairly wide plain of Santa Eufemia. The mountainous ridge of the peninsula then continues on towards the South with the range known as the Serre (1420 metres) which finally joins the last Calabrian ridge of mountains, the Aspromonte (1956 m. above sea-level), a vast massif, deeply furrowed in rays by rivers with large terraces (plains) from the south to the North-West. Between this massif and the Poro plateau, further North, you can find the fertile plains of Gioia of alluvial origin.