London is the greatest green city on Earth. Half its area is green spaces, including 3,000 parks. Luckily, you don’t need to know them all. Only these 50. Whether you want walks, beauty, views or picnics, this unashamedly opinionated guide tells you exactly where to go for London’s ultimate green escapes.

London born, bred and buttered, Harry Adès spent his childhood larking around parks and his teenage years loitering in them. Much of his adulthood has been spent watching his children lark around and loiter in parks. He has written at least 10 other books and likes nothing better than a picnic in the long grass.

Marco Kesseler is a London-based photographer whose work is rooted in people and nature. When he’s not taking pictures for the likes of FT Magazine, The New York Times and TIME, Marco is often cycling around Britain, exploring urban and rural green spaces.