One Tree Hill, a dormant volcanic cone, has many geological features. A pre European Maori fortification (pa) was built on the cone. The Maori name for the hill is Maungakiekie - mountain of the kiekie, (kiekie is an epiphytic climber, Freycinettia sp.) The park’s donor Sir John Logan Campbell, one of the founding fathers of Auckland, is buried at the summit of One Tree Hill alongside the obelisk and the famous one tree.