Green Hill (also Matanginui or Greenmount) is one of the volcanoes in the Auckland volcanic field, located in the suburb of Greenmount. Its scoria cone had a peak 78 metres above sea level (around 48 m higher than the surrounding land), and had a grove of karaka trees. The hill was the site of a pā. It was quarried from 1870 onwards, and has been mostly quarried away. The site is now Greenmount landfill.