Originally Posted by
gerryl
while for the cultural landscape I would pick Veneto
In 2013 I went with a group of friends to a cycling "camp" based in a little town outside of Bassano del Grappa. Great daily riding. Rode to places like the Asiago Plateau (Gallio) and the area around Valdobbiadene, where they grow a lot of grapes for Prosecco. Lots of WWI history in the area. I would love to back and tour the area.
This looks like a great resource:
The Veneto - cycleways and cycle routes - Italy Cycling Guide