... the Lac de Mondély. It's in the middle of unaffected nature, as the French like to say, and is a genuinely idyllic and unspoilt place, never over-run, often almost empty even in August. To get there, you drive from either La Bastide de Sérou or Le Mas d'Azil for several kilometres over single-track rutted roads, wondering whether you've got lost, whether your exhaust is going to fall off and what you'll do if you meet a car coming the other way. Then suddenly you're there, and no matter how many times you've been before there's always that same sharp intake of breath.
There's a sand beach, lots of private grassy banks plus trees for shade; if you're feeling energetic there's a lovely walk all the way around, about 8 kilometres; and there's a little summer buvette where you can sit with a cold beer. Oh, and did I mention the swimming? It's fantastic. I like to swim over to the other shore and watch the dragonflies; often there are great crested and little grebes as well, and swallows swooping down to catch insects. There are no windsurfers or sailors, nothing to disturb the peace. You can swim with your eyes closed, just feeling the sensations, without worrying about hitting anything. The water in summer is always warm - around 25 degrees yesterday, with warmer to come - and there are no cold eddies to shock you, no waves to batter you around and no currents to drag you miles offshore.
It's quite simply wonderful. Did I mention that?