"So you've walked Snowdonia (well done you) and, as a result, turned into a hot, sweaty mess. What to do? Jump into Llyn Cau, the melted glacier slap-bang in the middle of the crater of Cadair Idris, that's what. The 1,150-foot ascent will have you gagging for a chilling dip, even if you're surrounded by freshly fallen snow."
The best wild swimming spots in the UK
Alamy
