sounds fun smashing into a tree and getting stuck in mud ....i've done 30 odd in a day...and tunnels..its fun if u have a boatload there used to be at least 8 of us...one holiday there were 14 of us and we took 2 boats...canal iced up once
Great aquaduct on the Llangollen..went across it ages ago and I'm sure there was just railings/ path on one side and a sheer drop on the other
I've also done the Shropshire,Trent Mersey (Anderton Lift), Oxford, Grand Union, Leeds Liverpool, Bridgewater, Rochdale, Peak and a few I can't remember