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

Queen Mary 2 becomes the largest ship to ever sail New Zealand's Milford Sound. The 151,400 tonne ocean liner carried 2500 guests through the famous fiordland on Saturday, March 16.Credit ...

It's all in a day's fun in magical Milford Sound/Piopiotahi, which is a roughly 180-mile drive northwest of Queenstown. Famously dubbed the "eighth wonder of the world" by novelist Rudyard Kipling ...

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.