The Italian hills have different origins.
There are:
morainic hills, formed by the accumulation of debris transported by glaciers;
volcanic hills, which are nothing more than the remains of ancient extinct volcanoes, rounded by erosion;
sedimentary or tectonic hills that were formed as a result of the lifting of the seabed;
structural hills, i.e. ancient mountains that have been eroded by atmospheric agents.The hills in northern Italy are located mainly between the Alps and the Po Valley. the origin of the hills that are located in this part are moraine. Northern Italy in Piedmont are: the Langhe and
the Monferrato. Both of these hills are famous for the wines that are produced there. in Lombardy, Brianza and Veneto: the Berici Mountains and the Eugenean Hills. the hills in central Italy are located mainly along the sides of the Apennines. The hills of central Italy located along the Tyrrhenian coast are mainly of volcanic origin. hills that are located in central Italy are: in Tuscany
the Chianti hills, famous for the wine that is produced there, the Metalliferous hills rich in metals and in the Lazio region the Alban mountains. the hills of southern Italy are not arranged in a very regular way. The hills that we find in southern Italy they do not all have a common origin; however, they are characterized above all by the presence of a clayey and arid soil easily subject to landslides.The main hills of southern Italy are located in Puglia and are: the Gargano; the Murge.The hills they are also present in insular Italy. In Sicily, they are found mainly in the southern part of the island. In Sardinia, the hills represent 68% of the territory.