Mercado 23 is NOT the same as Mercado 28. Mercado 23 is a LOCAL market that's definitely worth visiting. It's tucked away from the main street, so make sure you get directions from someone who knows where it is. Outside, there's a gentleman sellling fresh honeycomb from a cart. Walking throught the market you'll also find fresh fruit and vegetable stands, local spices and sauces, a "food court", and the most wonderful pinata shops filled to the ceiling with bags of candy. The market is also a great place to shop for pottery at a decent price (after doing some haggling).