The best holiday i ever had was a week on the Shropshire Union canal. I chose the Llangollen Branch so we could go over the Po ntcysyllte Aquaduct. 175 feet up and looking over the side of the boat you see, water in the distance, freaky I hoped then they drained the bridge for emergency repairs just before we embarked - that was me and ex-wifey. Not a recipe for best holiday but the tranquility and separation from roads and cars and the lack of options in direction took me into another world and four days later I realised I had forgotten all about the "work" that had funded this bliss. I suspect the canal is a little more crowded than in 1976. I never got to cross the aqueduct - even walking on the towpath.