The Broca Food Market in Brockley - 10 minute drive/30 min walk from ED - you said you wanted to explore : ) is great. It stocks lots of organic/wholefood stuff, fresh fruit/veg, fresh bread, farm shop meat/dairy produce and ethical cosmetics, cleaning products etc. It is quite a bit cheaper than ED prices too. Wellbeing in Sydenham is also a great wholefood store, again a bit cheaper than ED. The Nunhead cemetary is interesting - gothic/Victorian - good for walks.