Hunter Valley vineyard owners rally for UNESCO heritage listing for vines among world's oldest

Alessa, Andrew, and Ollie Margan are the major forces behind the campaign to get the vines heritage listed. (Supplied: Andrew Margan)

Sitting upon a hill overlooking the Hunter Valley, vineyard owner Andrew Margan sees new homes where some of the world's oldest vines once grew.

With the NSW wine region set to mark 200 years, the industry is pushing to get the remaining vines world heritage listed to make sure no more can be pulled out.