Tank Farm (sometimes Tuff Crater) is the name of a volcanic explosion crater (or maar) in North Shore City, New Zealand, near the approaches to the Auckland Harbour Bridge.Its Maori name is Te Kopua o Matakamokamo, meaning 'the basin of Matakamokamo'. Matakamokamo is an ancestral figure in Maori oral tradition who, during a domestic argument, is said to have inadvertently cursed the goddess of fire, Mahuika.