Londons really fifty little towns that have been smooshed into each other because there's a river and you need that to move food around goodly or some other gay reason. That being the case there are some really nice places literally two minutes walk (half an hour for the yanks at waddling speed) from absolute shitholes full of cultural enrichment from Albania and Somalia. Overall I rate London as - it's not as bad as Paris out of 20, it's loud, full of doctors and lawyers, it's expensive as fuck, there are enclaves of every foreign religion and ethnicity (some of which are extremely hostile to whites) but there are quite a lot of parks and central London has transformed from fuckawful to fancy future city 2000.