Photo: Julia Chapple, Wollumbin Wollumbin (also called Mount Warning) is located in the Tweed Range in the Northern Rivers region of New South Wales, Australia, formed from a volcano that erupted around 23 million years ago. Google Maps National Parknationalparks.nsw.gov.auSummit Elsewhere on the WebBig Volcano is located in the region.tweedvalleyweekly.net.au – Facebook Visit NSW: World … Continue reading Wollumbin