The Gaibola sinkhole is a large sinkhole in which ponors give way to numerous cavities. The Inferno sinkhole features numerous ponors, which give way to small cavities such as the Coralupi Cave. Several houses have been built in the more gentle slopes characterizing the Ronzano sinkhole, which are surrounded by extensive cultivations of evergreens, vineyards, rows of fruit trees and meadows.
A large amphitheatre-shaped badland develops south of the Paderno Mountain towards the Savena River valley, known for the discovery of the "Bologna phosphorus stone", which took place in 1602 thanks to Vincenzo Casciarolo's search -a shoemaker from Bologna with a passion for chemistry-.
Colle di Barbiano is placed in a panoramic and isolated location but very close to Bologna city center. Near the intersection of San Vittore, which leads to Mount S.Vittore. Part of CAI forest track n.902.