Parks and open spaces in London

Green space in central London consists of five of the capital's eight Royal Parks, supplemented by a number of small garden squares scattered throughout the city centre. Open space in the rest of the region is dominated by the remaining three Royal Parks and many other parks and open spaces of a range of sizes, run mainly by the local London boroughs, although other owners include the National Trust and the City of London Corporation.

Source: Wikipedia — Parks and open spaces in London (CC BY-SA 4.0)