New York City subway riders trample over thousands of used MetroCards in stations across the city every day.
But one artist has given new life to these abandoned MetroCards by using them to create stunning collages of New York City's greatest buildings, people, and figures.
German designer Nina Boesch, who lives in New York, started making MetroCard collages for friends 10 years ago. Since then her MetroCard art has appeared in exhibitions across the country.
She uses the plain backsides to make grayscale collages and adds color with the yellow-and-blue front sides. In some of the creations, you can even see snippets of NYC's "If You See Something, Say Something" ad campaigns that have appeared on the backs of MetroCards.
Water Tower Skyline, 2011
Coffee Cup, 2011
The Lincoln Center
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