The Park constitutes a territorial entity of vast dimensions, extending practically across almost the entire southern semicircle of the Province of Milan.
The environmental values of the park area are those characteristic of the Milanese irrigated plain, intensely used by agriculture over the centuries, starting from the first reclamations carried out in the Middle Ages by the monastic orders.
The same agricultural works, including the complex of the irrigation network, the canals and fountains, as well as the hedges and rows, have fit perfectly into the landscape to enrich it with aesthetic and natural values.
In particular, the areas around the heads of the numerous fountains constitute valuable environments also for the defense of nature.
However, forests are rare, due to the intensive transformations of agriculture in recent decades.
The Park includes the Fontanile Nuovo and Sorgenti della Muzzetta nature reserves recently established by the Region, and the local parks of supra-municipal interest, such as Fontanili di Bareggio, Oasi di Lacchiarella, Parco dell'Addetta, recognized by the Region.
There are numerous historical-architectural emergencies, including the abbeys of Chiaravalle, Mirasole and Viboldone, the castles of Tolcinasco and Zibido, the Trenzanesio estate, the various rural centers and the system of large farmhouses.