It’s a wonderful lake near Novara, not far from Milan and Turin, with really nice views on the mountains.
Really quiet place, we spent 2 nights in this camping called “Camping Castellania Del Lago D’Orta”.
The owners are really nice people, toilets are ok, although a bit old.
Best part is that you really can camp on the lake side, as you can see from the pics.
Water is clean and you can have a fresh bath pretty easily.