It's very common for people to look at street art or graffiti in a negative way. The reality is however, that graffiti is simply a method for certain artists to express themselves, and it can have very positive outcomes in society. It only becomes illegal or vandalism when it is done without permission.

Street Art

Unknown: Legal Graffit Park, Krawkow Unknown: Foto Museo Cuatro Caminos,

Mexico City

Vandalism