Italy
Almost hidden valley, just inland from the village of Toscolano-Maderno on the western shore of Lake Garda is the Valle delle Cartiere. Now a peaceful and green place - not on most tourist agendas - this valley has a history of paper production on a huge scale, making use of the river to power the machinery. The ruins of the old factories litter the valley and some are made visitor friendly with exhibits and information plaques and there is a visitor centre at the start of the trail. Allow a couple of hours to walk to the top and back. Pack reasonable walking shoes for the walk, and swim wear if you want to cool off in the icy stream - good shallow swim area at the top of the valley.
Interesting day out, with a chance to see some different scenery from the lakes - despite being very close.
Driving north on the main road up the lake, take the first left after crossing the small river, follow the road past some houses and then through some tunnels until you come to the car park - you will have to continue on foot after this.
Google map: bit.ly/LJFHMW