A million tourists visit Milford Sound every year, including on cruise ships. What is the level of risk from natural disaster New Zealand is prepared to accept?

But an even more devastating catastrophe could happen at one of New Zealand’s most iconic tourism destinations, Piopiotahi/Milford Sound. And it is unclear how this disaster can be prevented.

We toured Milford Sound, Doubtful Sound, and Dusky Sound over a day of sailing- exploring many regions only accessible by sea or by air, and each more incredible than the last. Each destination ...