Nogales Border Wall - 3
These are allusions to, or large versions of, milagros. Milagros are a catholic tradition where people attach little metal charms to statues of saints or to the walls of a church. the charms are shaped like something they want or are hoping to happen, or like something that they've received already, placed as thanks to that saint.
these are by Taller Yonke (Alberto Morackis and Guadalupe Serrano, see www.muralesfrontera.org for more info)