The Feria de San Telmo, Sundays only, is a great place in Buenos Aires to shop for things unique. And the fun extends beyond the search for one of a kind souvenirs at the city’s largest antiques fair. Enjoy lunch at an outdoor café, watch street players perform, take a leisurely stroll, listen to tango and even test your tango skills at a neighboring salon. And turn a shopping trip with kids into a half or full day outing in colonial Buenos Aires.