I remember when the Elk Grove Chamber of Commerce, in CA, invested in a herd (fifty) of life-size fiberglass elk statues and installed them, decorated and named by local artists, in front of businesses and other public places: http://www.elkgrovecity.org/arts/artwork-06-medical-elk.asp.
The Mexico City Airport seems to be using the same concept for a series of heads that they have installed since December.
I saw two of these heads as I was scrambling for my flight to Las Vegas. And, I was thrilled to see art in this usually dark and boring shopping center. There is plenty of room for even more color here.
Mexico City is so full of museums and art, it is good to see the airport reflecting a sliver of this part of the culture.