If Buenos Aires is known for one thing, it's tango. So there's no better place in the world to find tango shoes. Just one block of Calle Suipacha offers quadruple the selection of the footwear options found in even New York City, and at half the price you'll want to make sure you've brought a suitcase with lots of room. My favorite place to start is Flabella. Locals and tango instructors will direct you to this shop, where you'll receive attentive service to help you find the perfect heels to optimize your ochos--or to at least help you look like you know what you're doing.