For a general description on the series please refer to the text for the 'Two Trails: 1'
Take time to enjoy the river scenery, where in addition to the numerous swans, ducks and morehens, you can often see: Canada geese, heron, cormorants and sometimes a kingfisher and little egret along the river.
You are looking for a film canister at about head height, please replace securely, so that it doesn't fall out.
After this one, and before getting to No 6, you can stop off to find the 'Wye Valley Treasure Tree' cache, if you haven't found it before.