The wonderful Henry Moores may have gone from Kew but there they've just opened this - a tree top walk.
It was rather wonderful - you get a great feeling of peace, walking at the same height as the tops of the trees, looking over south-west London, listening to the rustle of leaves. The structure is built of iron but with surface rusted so it blends nicely into the park lands around, and was designed by the same team as the London Eye.
Well worth the trip up river if you're visiting and want to escape the rush and crush of the city for a few hours.