The mercado down the street, in our neighborhood, is great for fresh fruit and vegetables. There is a top notch meat market with friendly, helpful butchers. You can get keys copied, buy fresh squeezed orange juice or yummy carrot juice and get a free calendar with your purchase of honey and butter. It's a nice place.
And if it is yarn you are looking for, well, there is a yarn store. Only acrylic is available, but there are lots of colors. The only other place I have found yarn in this city is at WalMart, which has some white sport weight cotton.