Have you seen two bridges, one under another? If so, have you ever been on them? One - for sure, because in Saskatoon everyone has to drive on South Bridge at some point. But have you been on the pedestrian bridge underneath?
Cache is hidden near the west entrance to the bridge. You can park in Diefenbaker and walk along the bridge, enjoy the view and capture some pictures.
Cache contains a pencil and a logbook. Remember to use stealth.