Casteluccio and the Gran Piano in the Sibillini Mountains in central Italy
Other attractions in the park are the historical and cultural riches of the various small towns such as Visso or San Ginesio, as well as important religious sites. The Santuario Madonna dell'Ambro, for instance, stands at the place where a young shepardess is supposed to have seen a vision of the Madonna. There are also a number of museums, celebrating local life and customs such as the anthropological museum in Amandola or the museum of charcoal production in Cessapalombo.
Information about the mountains can be found at the many Case del Parco around the National Park. The main information centre is in Visso. The website of the National Park also provides a comprehensive list of things you can do in the park in English and publishes a number of guidebooks and maps (some in English), also on sale online.
There is a wide range of videos on the website YouTube that will give you an idea of what the mountains look like. Satelite images on Google Earth were updated last year and you can now see the mountains in 3D - especially useful for planning walks or bike rides. In both cases just search with the words 'Sibillini Mountains'.
Admiring them from his distant Recanati home the famous Italian poet Leopardi described the mountains as the Monti Azzurri (blue mountains). Take time to visit them and you will find lush green slopes replete with natural beauty, peace and quiet.