I found this graphic, the book cover, I believe, of Parks of the World comparing different park sizes, via AnArchitecture. It has 1,017 acres, compared with 843 acres of Central Park in New York City.
'The Parks of the World' is a visualization project by Mikell Fine Iles. The graphics were created to comparatively visualize the qualities between the large urban parks that Mikell visited in 2011.The diagrams feature parks like Piedmont Park (Atlanta), Rosenborg Castle Gardens (Copenhagen), Vondelpark (Amsterdam), Tiergarten (Berlin), Prospect Park (Brooklyn), Golden Gate Park (San Francisco) and Central Park (New York). In the scale comparison, however, Europe gets short: there is too little land space to lead the charts.