El Rastro Review
Named for the arrastre (dragging) of animals in and out of the slaughterhouse that once stood here and, specifically, the rastro (blood trail) left behind, this site explodes into a rollicking flea market every Sunday from 9 to 3, with dozens and dozens of street vendors with truly bizarre bric-a-brac ranging from costume earrings to sent postcards to thrown-out love letters. There are also more formal shops where it's easy to turn up treasures such as old iron grillwork, a marble tabletop, or a gilt picture frame. The shops (not the vendors) are also open during the week, allowing for quieter and more serious bargaining. Even so, people-watching on Sunday is the best part: for serious browsing and bargaining, any other morning is a better time to turn up treasures.