wow a lot of Italian mates here!
for a quiet and really nice sketch day i suggest Torino. it's a really quiet city (few tourist and no business people who run around) that offers a big beautifull park and an urban zone with great squares, monuments, medieval castles, a big river with large bridges. all around we can se hills and mountains.
hope this don't look like a travel agency advertising
for all interested plese email me at firstname.lastname@example.org