Riverside Park midden consists of a low sandstone outcrop on the banks of the Cooks River. Apart from a large number of shells, an axe head was discovered in 1961 by children digging in the area.

The axe was later authenticated by the Australian Museum. Marrickville Council has now registered Riverside Park Midden as an Aboriginal Site on the New South Wales Parks and Wildlife Service Aboriginal Heritage Information Management System and is now part of Marrickville Golf Course.