Listed below are a sampling of public gardens and parks in Hong Kong
Chater Garden
https://ilovehongkong.org/chater-garden-hong-kong
Hong Kong Park
https://www.lcsd.gov.hk/en/parks/hkp/index.html
Hong Kong Zoological & Botanical Park
https://www.lcsd.gov.hk/en/parks/hkp/index.html
Victoria Peak Garden and Playground
http://www.hk-victoria-peak.com/peak-garden-and-playground/