The longest cave in New Zealand is the Bulmer Cavern in
Mount Owen, south-west Nelson, which is 39.9 kilometres
(24.8 miles), 400 metres of which are unsurveyed. John
Patterson discovered the cave on New Year's Day 1984,
by dropping a rock down and counting the seconds until
it reached the bottom.
Mount Owen, south-west Nelson, which is 39.9 kilometres
(24.8 miles), 400 metres of which are unsurveyed. John
Patterson discovered the cave on New Year's Day 1984,
by dropping a rock down and counting the seconds until
it reached the bottom.
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