There is a public walkway in Cambridge's Central Square where graffiti is not only legal, it's encouraged!
Modica Way is nestled between Massachusetts Avenue and City Parking Lot 5. Shaded by a colorful plastic "stained glass" awning, the alley features a permanent black and white installment of Central Square people and places.
The other side, however, is available as a canvas for the colorful creativity of Boston's street artists.
From simple graffiti tags to elaborate murals, the artwork is wild, free and ever-changing - hence, its classification as a "living art gallery".
The colorful canopy provides a bit of shelter from the elements and plays off the paintings when the sun shines through.
While the majority of the murals are created by local street artists, nationally known artists like Shepard Fairey and Enzo & Nio have also left their mark on the walls of Modica Way.
Fairey is the creator of the "Obey" clothing line and the iconic Obama "Hope" poster.
You can find the living canvas of Modica Way in Central Square next to Central Kitchen. The closest address is 565 Massachusetts Avenue.
Perhaps you can witness the city's next great artist creating his or her masterpiece during your free visit to this open-air celebration of culture.