Incredibly flat and fast course . Ideal weather and zero pollution since it is a mid-size town with countryside around.
Ferrara is an historical town mid-way between Bologna and Venice.
A lot of sightseeing in the area (Ferrara itself, Ravenna, Bologna, Venice, Adriatic coast, etc).
Entry fee: 20 EUR/35 EUR (late entry).
I did take part in it several year ago and the course is very relaxing and totally flat flat.