El Jueves is an institution - Calle Feria is transformed from a somewhat quiet cafe-lined space to…read morea bustling market where just about everything is for sale (spotted today: a Milli Vanilli LP, lots of pornographic magazines, toy cars, video cassettes, door knobs, old flip flops, stamps, postcards, old cell phones). It's definitely the kind of mercado where you have to bring your patience and bargaining skills, but if you're in the mood to search for a treasure, head to c/Feria on Thursdays.