Bronx River Falls. Bronx Park, New York City. Bronx Park lies on both sides of the Bronx River, between Williamsbridge and West Farms. It comprises a total area of 662 acres, 250 of which have been given to a botanical garden and 261 to a zoological park. Both institutions are corporations managed by trustees and occupying their sites by an arrangement with the City. There are many beautiful natural scenic spots along the Bronx River, including a miniature waterfall.