I've seen a number of videos on Youtube of people sliding down the muddy banks of the Shubenacadie river in Nova Scotia and it looks great fun. But I can't afford to travel to Nova Scotia.
Is there anywhere in Europe - even better if it's in the UK - where I can do something similar? My web searches for this tend to turn up a) muddy obstacle races, which sound a bit more intense and less "just messing about" than I'm looking for and b) stories of people being rescued after getting stuck in the mud! So where can I do something like this safely?