They call it the Freedom Trail. A line that snakes through Boston, a walking tour that takes in all the must-see locations where modern America began. Sure, at just two and a half miles it sounds ...

The paintings are often large in scale, almost cinematic in effect, the imagery confrontational, packing a punch, 120 works, now at the Contemporary Arts Museum Houston by artist Vincent Valdez.

From ancient cave paintings to contemporary protest art, graffiti has evolved into a powerful medium for social commentary and change. The roots of graffiti can be traced back to prehistoric times, ...