in a river?Yes, loads of times. Summer during my childhood was spent swimming in the rivers around the Lake District. The last time was on Arran in May (or should that be in the
beck section). Oh, and some river in the pampas of Bolivia where there were pink dolphins.
in a large freshwater lake?From memory I've swam in Bassenthwaite & Ullswater. Probably more, too. Ah, yeah - Lake Malawi - that's pretty big. Oh, and the reservoir in the Peneda-Gerês National Park in Portugal was lovely too, if one ignored the
no swimming signs.
in a small mountain tarn/beck/loch/llyn?The last was at Easter when I'd been climbing in Turkey, it was baking hot and there was a small river following past the crag. I've swam in a number of the tarns, too, the last time being about a year ago when I went up to Scoat Tarn on a fieldtrip. Swam loads of times in the tiny ponds that are scattered across the Badain Jaran Desert (China) when I was on fieldwork 'cos it was the easiest way to collect samples, and clean yourself too.
in really cold water?Ullswater in November was pretty cold. The Atlantic off the Dingle Peninsular I remember being nippy too. The River Derwent on Boxing Day was cold too, but at least I had a wet suit that day (tho I'd have been better off staying in the kayak).
in a rock pool/natural tidal lagoon?Will have done at some point
in a cave?No. I'll have to change that at some point
in the buff?Shocking behavior
.
So far, only twice this year.