Delta Park is one of Johannesburg's biggest parks. It is adjacent to the suburbs of Blairgowrie and Victory Park. It comprises 13 hectares of grassland and woodland, and three tree-lined dams. It has many walking trails, a "sensory trail" and bird watching hides. It also incorporates the Florence Bloom Bird Sanctuary and the Delta Environmental Centre. The latter offers wildlife-related courses to adults and children, including holiday programmes; about 20 000 children take part in the programmes every year.