These are two of my favourites - firstly, the 50m outdoor pool in Chamonix. Swim one way with a view of Mont Blanc, back the other way for a view of Flegere/Brevent.

Second on my list is the pool in Les 2 Alpes. At 1600m it takes a while to get used to swimming at this altitude, but you know it's good for you!

Have you tried either of these? What are your favourites? Share your tips and experiences here