Hong Kong is 2,491 times larger than Riverside Park (Manhattan).
Area: 1,104 km2 World Factbook
Population: 7,112,688 (July 2014) World Factbook
Hong Kong, alternatively known by its initials H.K., is a former British Colony and is currently a Special Administrative Region of the People's Republic of China, enclosed by the Pearl River Delta and South China Sea. Wikipedia
Area: 0 km2 calculated
Riverside Park is a scenic waterfront public park on the Upper West Side of the borough of Manhattan in New York City, operated and maintained by the New York City Department of Parks and Recreation. Wikipedia