New Zealand is a very beautyful country! There are many karst areas (click on the right map to see it). On the south island you can find some very large caves with alpine charakter. Some have a length about 40 kilometers. On the north island one of the best place is at waitomo. Flower Cave, Hollow Hill, Waipuna Cave, Gardeners Gut, Kuratahi Cave are some famous caves. But some of them are gated! Only with permit you can see the highlights!

Two links about new zealand caves:
New Zealand Speleo Society
Homepage from Phil Round (Cave photographer!)