Tui De Roy / Mt Ruapehu eruption 1996, highest volcano on North Island, Ohakune, Tongariro National Park, New Zealand

Albert Aanensen / Mount Ngauruhoe and toe toe grass. Mount Tongariro NP, New Zealand

Andy Trowbridge / The upper Emerald Lake on the Tongariro Crossing, looking east, it striking colours are caused by dissolved minerals being washed down from thermal area of nearby Red Crater, Tongariro Crossing, Tonga...

Ernie Janes / Emerald Lakes, Tongariro Alpine Crossing, Tongariro NP, North Island, New Zealand

Ernie Janes / Sign prohibiting dogs from entering a Kiwi conservation area, Tongariro NP, North Island, New Zealand, January 2009

Rob Brown / Mount Tongariro, Mount Ngauruhoe and Mount Ruapehu, Tongariro National Park, New Zealand

Colin Monteath / Rainbow over Rangipo Desert near Mount Ruapehu, Tongariro National Park, New Zealand

Rob Brown / Mount Ngauruhoe and Mount Ruapehu, Tongariro National Park, New Zealand

Rob Brown / Mount Ngauruhoe and Mount Ruapehu, Tongariro National Park, New Zealand

Colin Monteath / Mount Ngauruhoe, an active volcano in spring, Tongariro National Park, New Zealand

Theo Allofs / Emerald Lakes seen from above filling old volcanic explosion pits, Tongariro National Park, New Zealand

Theo Allofs / Mount Ngauruhoe as seen from hiking trail, Tongariro National Park, New Zealand

Jim Harding / Waterfall cascading over mossy rocks, Tongariro National Park, New Zealand

Harley Betts / Late winter sunset on Mount Ngauruhoe (2,291 meters), Tongariro National Park, New Zealand

Harley Betts / Snow patterns on shoreline ridges beside the partly frozen Blue Lake, Mount Tongariro, Tongariro National Park, New Zealand

Albert Aanensen / Korikori (Ranunculus insignus) Tongariro NP New Zealand

Mark Jones / Mt Ruapehu time exposure shows lava bomb traces and lightning in swirling ash plume from 1996 eruption, Tongariro National Park, New Zealand

Albert Aanensen / Mount Ruapehu erupting, 24th October 1995. Tongariro NP

Tim Edwards / Mt Ruapehu, Tongariro National Park, alpine landscape, New Zealand

Albert Aanensen / Mount Ruapehu from Desert Road. Tongariro NP New Zealand

Mark Sedon / Skier descending Mt Ruapehu above active Crater Lake, Tongariro National Park, New Zealand

Rob Brown / Mt Ngauruhoe in foreground and Mt Ruapehu behind, Tongariro National Park, New Zealand

Tui De Roy / Mt Ruapehu eruption 1996, at 2,927 meters, the highest volcano on the North Island, ash explosion of 3rd day of eruption, Tongariro National Park, New Zealand

Tui De Roy / Mt Ruapehu eruption 1996, at 2,927 meters, the highest volcano on the North Island, ash explosion of 3rd day of eruption, Tongariro National Park, New Zealand

Tui De Roy / Mt Ruapehu eruption 1996, at 2,927 meters, the highest volcano on the North Island, ash explosion of 3rd day of eruption, Tongariro National Park, New Zealand

Tui De Roy / Mt Ruapehu eruption 1996, at 2,927 meters, the highest volcano on the North Island, ash explosion of 3rd day of eruption, Tongariro National Park, New Zealand

Tui De Roy / Department of Conservation places warning road signs in an effort to minimize road kills of endangered national bird, Tongariro National Park, New Zealand

Tui De Roy / Mt Ruapehu eruption 1996, highest volcano on North Island, Hakone, Tongariro National Park, New Zealand

Albert Aanensen / Tongariro NP, Mount Ruapehu eruption. New Zealand. June 1996 Ash and clouds North Island.

Albert Aanensen / Mount Ruapehu eruption over Lake Taupo June 1996. Tongariro NP, New Zealand NZ. .

Albert Aanensen / Tongariro NP, Mount Ruapehu eruption over Lake Taupo, New Zealand. Ash and clouds, June 1996.

Tim Edwards / Mount Ruapehu. Alpine landscape, Tongariro NP, New Zealand

Albert Aanensen / Mount Ruapehu erupting, 24 October 1995. Tongariro NP, New Zealand

Albert Aanensen / Mount Ruapehu from the north, Tongariro NP, New Zealand

Tim Edwards / View of Mount Ngauruhoe (volcano). Mount Tongariro NP, New Zealand

Albert Aanensen / Korikori (Ranunculus insignus) by water. Tongariro NP, New Zealand

Albert Aanensen / Invasion of heather in tussock land. Mt Tongariro NP, New Zealand

Albert Aanensen / Mount Ruapehu from Rangipo desert, Tongariro NP, New Zealand

Albert Aanensen / Ash fallout near crater of Mount Ruapehu. Tongariro NP, New Zealand 1996

Piotr Naskrecki / Southern Beech (Nothofagus sp) tree covered with moss, Tongariro National Park, New Zealand

Rob Brown / Mount Ngauruhoe, Tongariro National Park, New Zealand

Theo Allofs / Dirt road in Tongariro National Park, New Zealand

Guy Vickers / Morning clouds shroud Mount Ngauruhoe, Tongariro National Park, New Zealand

Shaun Barnett / Winter evening on Crater Lake, Mount Ruapehu, Tongariro National Park, New Zealand

Harley Betts / Late winter sunset on Mount Ngauruhoe (2,291 meters), Tongariro National Park, New Zealand

Tui De Roy / Mount Ruapehu eruption in 1996, seen from Whakapapa Village, Northwest Slope, Tongariro National Park, New Zealand

Mark Jones / Mt Ruapehu eruption June 1996, dawn on Rangipo Desert as large ash plume drifts over Mt Ngauruhoe, 2291m, Tongariro National Park, New Zealand