New Zealand
Harwoods Hole is a cave system located in the northwest of the South Island of New Zealand, in the Abel Tasman National Park. At 183 metres (600 ft), it is New Zealand's deepest vertical shaft. It was first explored in 1958, long after it was discovered. The track to Harwoods Hole is no longer marke
d or maintained by the Department of Conservation (DOC).
Listen to the audio guide for Harwoods Hole Free on WIP — starts by itself when you arrive, even with the screen off