Undulations.

Building an undulating park on the side of the motorway into London may sound like a harebrained idea, but somehow – it works. From the top of the hill you can see the famous silhouette of the city skyline, bathed in smog, and there’s nothing like the feeling of running down a dune – even when you’re miles from the sea. Our spontaneous sunset visit felt like summer encapsulated, in the very best way.