Heywood Park is a public park in the suburb of Unley Park in Adelaide, South Australia. It is home to the last remaining Grey Box gum trees (Eucalyptus microcarpa) on the Adelaide plains, some of which pre-date European settlement. The park takes its name from the place of birth of William Haslam, the property's last private owner; Heywood in Lancashire, England. The City of Unley council purchased the property and it was officially opened to the public on 10 December 1921. Today, the park is popular with families and children, in part due its "huge, magnificent, thick-trunked trees." As of 2014, a number of these have been marked for removal following concerns about falling branches and public safety. Some community members have raised concerns about the tree removals' impact on the park'