The graffiti artist, Trek6, painted the Yoruba goddess of the ocean, Yemaya, to honor his Caribbean roots. She symbolizes growth, something that he thinks Hialeah needs. Mandalit del Barco/NPR hide caption

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A minibus painted with the Rolling Stones' logo. Gregory Warner/NPR hide caption

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Two of the names carved into the Great Wall, in this case near Badaling, China. Authorities hope to cut down on graffiti by giving tourists a designated spot to leave their marks. David Guttenfelder /AP hide caption

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Graffiti artist Mauro Palotta says Pope Francis is the only world leader who stands on the side of the people. Sylvia Poggoli/NPR hide caption

toggle caption Sylvia Poggoli/NPR