If you love hikes, Orobie Bergamasche Park offers over 1,000 km of more or less demanding trails.
The most famous ones are "Sentiero dei fiori" (The Flower Trail), a real high-mountain botanic garden developing on the slopes of Mt. Arera at approximately 2,000 of height, and "Sentiero delle Orobie" (The Trail of Orobie) which, developing for over 85 km, crosses all the Prealpi Orobiche from mountain hut to mountain hut.