The Stratford-upon-Avon Canal has 3 cast-iron aqueducts. Two of which, the Edstone and the Wootton Wawen i have visited before but yesterday i walked up from Wootton Wawen to the third aqueduct, Yarningale. A great canal walk too in beautiful weather, the scenery in that part of the world is hard to beat to be honest. You can see the photos i took here.