A $17 million state-of-the-art adventure playground, which features three slides, a seesaw, fossil dig areas and 25m-long flying fox, has opened at Glenthorne National Park in O'Halloran Hill.

Set across 7000sq m, the play area also includes rope and log climbing activities, cubby building, Kaurna carvings and sculptures and has a wide range of accessible equipment to ensure children of all abilities can enjoy the space.

A visitor hub with shelters, barbecues, toilets, picnic areas, carparks and incorporating existing heritage buildings surrounds the playground.

The Department for Environment and Water's Executive Director National Parks and Wildlife Service, Mike Williams, said the department  had worked closely with the Kaurna community on the project.

"The adventure playground and visitor hub were an important part of the community’s vision for Glenthorne National Park-Ityamaiitpinna Yarta," Mr Williams said.

"The Department for Environment and Water has collaborated closely with representatives from the Kaurna community to develop some of the new attractions, including an interactive 'Footprints of the Past' trail."

He said there would be extra National Parks and Wildlife Service staff on hand during the busy opening period to help visitors explore the park and have fun learning about nature.

The Government of South Australia contributed $13.9 million to the project including providing the land and funding for the main building works.

The new attraction was officially opened to the public on Sunday 30 July 2023.

Glenthorne National Park is located16km south of Adelaide. Visitors can explore the wider park on foot or bike using the trails that extend out from the visitor hub. The trails feature interpretive signs and an interactive app, which explores the Aboriginal and European history of the park, as well as its environmental restoration and activities for children.

More information about visiting is available from Glenthorne National Park.