There are things you expect to see on a trip to San Francisco: you might root for the Giants at Oracle Park, you might browse the stacks at historic City Lights Books, you might climb so many of the city’s historic staircases that you’ve done your cardio for the whole year. What you wouldn’t expect is to stroll through SF’s massive Golden Gate Park and catch a glimpse of… a herd of bison? But that’s exactly what people have seen since 1891: giants of the Great Plains wandering happily through…
