Buenos Aires' oldest and most famous coffee shop is Café Tortoni, just a few blocks west of the Plaza de Mayo. A gorgeous space which has been serving porteños since 1858, the café is usually toward the top of everyone's "must-see" list. For good reason.
Spend any amount of time in Argentina, and you're going to become familiar with mate, a drink deeply ingrained into the country's psyche. We first encountered it in Spain, when we saw a group of kids passing around a round container with a metal straw sticking out of it. "Argentinians", our Spanish friend explained. "That's all they do. Drink mate".