Located about a kilometre walk from Redbridge Park & Ride assuming you need to find easy parking, the lock on the River Thames is an often missed sight for tourists to Oxford. The alternative and possibly easier access would be via St Mary the Virgin, Church of England Church in Donnington, Oxford which would be a closer and less muddy...
As live-aboard boaters we obviously see many locks. Iffley is well maintained, pretty and the lock keeper is friendly and knowledgeable and moorings are good. A lovely place to visit either by boat or just to enjoy.
You can enjoy being along the river, then stop to watch narrowboats work their way through the lock. There are plenty of ducks, geese, and swans about and this is an easy walk from East Oxford or Donnington Bridge, a bit further from Central Oxford.