Bangkok has large sections of greenery either preserved by the Department of National Forestry or designated as green zones. The city however, continues to lack a green belt development as economic activity continues to pour into the capital, resulting in massive housing projects along the suburbs.
Bangkok is known for its large green sections within the city centre, including the large forest park between Yannawa and Samut Prakan. This part of the city covers an area of over 50 km2 (19 sq mi). and is intended to buffer the CBD from the large industries of the west and south of Metropolitan Bangkok. Other areas include Bung Makkasan, an urban city buffer for residences, sections of many major roads which have unbuilt swamps and green fields. Some of these areas are intentionally undeveloped for protecting against urbanization, while others are land lost during the Asian Financial Crisis.
Lumphini Park is regionally famous. Renowned as Bangkok's Central Park, it was built in the early 1920s by Rama VI with this intent. It has since been used to hold grand pageants, ceremonies of the Thai constitution, and was a camp for Japanese soldiers during World War II. On Sundays, the western gates are open for runners to run on to Silom Road. The park is normally closed at night due to the incidences of vandalism, robberies and murders reported. Chatuchak Park and Rama IX Park are two of Bangkok's largest parks. The two, built in the past 50 years cater to Bangkok's suburban population are enormous and include botanic gardens, sports clubs and complexes, English/French/Japanese gardens and parks as well as large ponds and lakes. Other famous parks include Queen Sirikit Park near Lat Yao, Benchasiri Park on Sukhumvit, Saranrom Park across the Grand Palace, Sanam Luang, Suan Romaneenat, and Dusit Park.