When it is absolutely boiling hot in the summer and I mean really really hot, take a hike up the hill to Hampstead Heath, where you'll find the bathing pools. I think there are three in total, a ladies pool (which I suspect is the best and the only one I've been to) a mixed one and a men's pool (though I have heard that this is mainly frequented by those who are batting for the boys so you'll have to decide for yourself if it's up your alley). I can say though that the ladies pool is just amazing. It is actually just a big freshwater pond complete with water lilies, ducks and frogs, which is reserved for swimming there is a changing hut on the little deck. The best bit is that because the pool is so dark it stays really cool, which is fantastic in the hot sun. It's a real countryside escape just 20 mins tube ride from Leicester square. read more