Koryn Wicks' "Ghosts in the Machine," which uses augmented reality technology, takes participants up stairs, around pathways and into now-deserted enclosures. It's a haunting way to explore the park.
Add Yahoo as a preferred source to see more of our stories on Google. George Mandella, 51, of Pasadena holds up his phone while playing the "Ghosts in the Machine: The Old Zoo" mobile game at old ...
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