The traditional antiques fair is centered around Plaza Dorego, but there are 270+ stands set up over almost a mile along Defensa. It's awesome and exhausting, so many people, so much stuff to look at, and several different bands playing throughout. A really cool place to check out. I hear it's a big pickpocket area, but I didn't have any trouble. I'm running out of pesos, or else I would have several items I'd be taking home with me!