We have lived here for a dozen years, and still think this is one of the most beautiful parts of the world. There are some 'don'ts' - do not drive through Fowey, and do not expect to see the true character of this area from a car window, and it is an estuary, and full of narrow lanes and steep hills. So walk (park in boat park near Bodinnick Ferry), canoe, hire a motor-boat (or bring your own) and the best views are from the middle of the river!
If you walk, follow the Saints' Way from Fowey to Golant (and eat at Golant's excellent 'Fisherman's Arms' right by the water), or go on the Hall Walk - or just saunter through Fowey. You can visit Polruan on the foot-ferry, too, and from there you can walk to Lantic Bay - strenuous but well worth the effort.
There are plenty of opportunities to hire a canoe, and if on the water in something not too large, then do explore the almost deserted creeks (or Pills, as they are called) - Pont, Mixtow, Penpoll. Fowey to Lerryn and Fowey to Lostwithiel are great trips, but only on a rising tide, and a spring tide at that.
Please do not make lots of noise, and do not leave litter - this is a jewel of a place and should be treated as such.
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