On the back of the cards: "Tongariro National Park, in the central North Island, encompasses some of the most active volcanoes in New Zealand. Captured during a moment of perfection are Mt. Ngauruhoe, in the foreground, and Mt. Ruapehu behind."
"Tongariro National Park is the oldest national park in New Zealand, located in the central North Island. It has been acknowledged by UNESCO as one of the 25 mixed cultural and natural World Heritage Sites.
Tongariro National Park was the fourth National Park established in the world. The active volcanic mountains Ruapehu, Ngauruhoe, and Tongariro are located in the centre of the park." - in: wikipedia.