The Hellenic Society for the Protection of Nature (HSPN) is the oldest national environmental NGO in Greece, operating continuously since 1951 throughout the country for the protection of nature. From its very inception it has been at the forefront of efforts to establish national parks, to protect habitats and threatened species of fauna and flora, and to modernise and implement environmental legislation. It works with many other NGOs for common goals and cooperates with many national and regional state agencies.

Today the HSPN is active in 4 main areas: Environmental Intervention, Conservation and Nature Protection, Environmental Education, Sustainable Management and Public Awareness Raising.