For overseas 365er's, this is a volcanic island just near to Auckland City. Auckland has around 17 craters close to the centre of the city and Rangitoto has a big crater at the summit. It is mainly volcanic scoria, but the hardy pohutukawa trees are slowly taking a hold. It is a short ferry ride from downtown Auckland and a great place to spend a day climbing to the summit and wandering around enjoying the views.
Great shot, almost looks like steam coming out of the cone... alway's amazes me that it is almost the same shaped silhouette no matter where you view it from...
Ian