Unless you walked through the streets of Wynwood in Miami, you would not know how art can ignite and turn a shady crime-prone neighbourhood into the new graffiti mecca of the world. This is the world's greatest outdoor art museum. Walk with an artist like Ryan the Wheelbarrow of  Miami's Best Graffiti Guide and discover some of the best murals hiding here. Learn about the artists: where they are from, what they do and how they do it.  Wynwood in Mami is indeed the most instagrammable spot of America. Sujoy Dhar/NITN