Because it is the triumph of a lack of planning –both for good and bad. It's chaos –and whether you say that with a gasp of despair or glee or both is up to you. Whereas Paris (certainly in the centre) is the success of a single overarching monomaniacal topographic vision, London is a chaotic patchwork of history, architecture, style, as disorganised as any dream, and like any dream possessing an underlying logic, but one that we can't quite make sense of, though we know it's there. A shoved-together city cobbled from centuries of distinct aesthetics disrespectfully clotted in a magnificent triumph of architectural philistinism. A city of jingoist sculptures, concrete caryatids, ugly ugly ugly financial bombast, reconfiguration. A city full of parks and gardens, which have always been magic places, one of the greenest cities in the world, though it's a very dirty shade of green –and what sort of grimy dryads does London throw up? You tell me.