Mount Warning (Aboriginal: Wollumbin), a mountain in the Tweed Range in the Northern Rivers region of New South Wales, Australia, was formed from a volcanic plug of the now-gone Tweed Volcano. The mountain is located west-south-west of Murwillumbah, near the border between New South Wales and Queensland. Due to Mount Warning's proximity to Cape Byron, the Australian continent's easternmost point, it is the first place on mainland Australia to receive the sun's rays each day.