More than 4,000 plants of native species were planted at Quedjinmia Reserve in Dunsborough to help revegetate the significant Noongar site.
A team of volunteers including students from the Yallingup Steiner School helped the Undalup Association plant trees on the culturally sensitive area.
Undalup cultural custodian Iszaac Webb said they were contracted by the City of Busselton to do a revegetation project at the site.
"This built on work that had already been done by the Friends Of Group and locals who live at Windlemere Estate," the said.
"We were contracted for this part of the reserve because of the burials which are here."
Mr Webb said when the roundabout on Caves Road, Chicken Treat and Police Station in Dunsborough were constructed bodies were located in the land.
"It was a registered site but it had been unregistered," he said.
"The bodies were repatriated to Quedjinmia Reserve, the reserve was recently renamed.
"Quedjin means white bone or bone place, and mia means house, so it is like the bone house."
Mr Webb said Windlemere Estate used to be a Noongar camping ground that overlooked an old wetland system.
"It looks back towards Commonage Road and Simmos Ice Creamery, it used to be an old wetland system that used to feed into Toby's Inlet and the bridge as you come into Dunsborough, he said.
"The old people would camp up here and they had some old burials down the bottom.
"It is a really significant place for the old people and that is why we are here today working with the students and volunteers."