List of urban parks by size
A list of international urban parks larger than 1,000 acres (405 hectares; 4 square kilometres; 2 square miles) and contained entirely within a city's municipal or metropolitan boundary.
...
Wikipedia
A list of international urban parks larger than 1,000 acres (405 hectares; 4 square kilometres; 2 square miles) and contained entirely within a city's municipal or metropolitan boundary.