Val d'Ossola is full of high mountains and the most interesting towns are:
Vogogna with its ancient medieval town.
Macugnaga, at the feet of mount Rosa, with the house-museum Walser.
The gold mine of Guja, the only museum mine in Italy.
Lovely are the foot paths that from the town take you to the view points for the glaciers of Mount Rosa. www.macugnaga.it