In places, the wall forms a canvas where art can be created. A few examples include this instance near Tecate
JR, a French street artist, hasn't answered that question — and that's the point. His massive artwork on the border, which coincided with the decision to rescind DACA, is the "start of a discussion."
Also have this exhibition on the Mexican side of the wall
American and Mexican artists are working to turn the Mexico-U.S. border fence into an over a mile-long gorgeous mural.
Also some examples like this protest art
The beginnings of a wall with Trump's name on it have emerged along the US-Mexico border, but it is not likely what the presumptive Republican nominee has in mind.
Curiously, some of these is even a reminder of the Running Fence exhibition from Christo and Jean Claude in the 1970s