The Roccolo park is a local park which is placed in the high Pianura Padana, in the north-west of Milano’s province, expecially in the southern Altomilanese; it includes wooded and farming areas of Arluno, Busto Garolfo, Canegrate, Casorezzo (current management office seat of the Park), Nerviano (since 1997) and Parabiago’s municipality, overall we have 1595 hectares (almost 16 Kmq).
Established in 1991 for the local natural elements safeguard and the agricolture esteem, it employs about 80% of the whole surface, with corn, wheat, oat and pasture growing.
The 9% of the remaining area is characterized by woods, while the 1 % is characterized by viability, caves and Villoresi canal with its secondary irrigation canal network.  Another charateristic of the park are the many farmsteads spread all over its territory, a statement of the area’s storic and agricoltural past.
This park has been acknowledged in 1994 as Regione Lombardia’s agricoltural public park.
The park takes its name from a technique which was used in the past for the bird catching (which is illegal now), the Roccolo: an oval open space in which it used to rise a three-floor turret camouflaged in the vegetation. The first floor was used to keep cages, utensiles and other necessary tools; the second one was used by the people who wanted to watch the hunting; the third one for the bird catcher who was able to scare and then catch the birds with a net. Almost the whole area was enclosed by a low hedge, and then by two parallel lines of trees which used to form a covered walkway about one meter wide, in which the net used to erect. The wood used to be cut on the topside so that scared birds were induced to go down and remain trapped into the net.
Roccolo Park is now populated by many tipes of birds, and also some rare species like owls and towny owls.