Milford Sound sits at the end of New Zealand's Fiordland, where rainforest meets ocean in a fjord carved by glaciers 100,000 years ago. It's not actually a sound—Captain Cook misnamed it. This is a proper fjord, with walls rising straight from dark water that reaches 290 meters deep in places.

The rainfall here averages 6.8 meters annually, creating hundreds of temporary waterfalls that cascade down granite cliffs after storms. Bottlenose dolphins live here year-round, alongside fur seals and Fiordland penguins. The freshwater layer on top creates a rare underwater environment where deep-sea species thrive just meters below the surface.

Visit September through November or March through May to dodge peak crowds. The drive from Queenstown takes about four hours through the Homer Tunnel. Book cruises ahead—the road sometimes closes after heavy rain, and day trips sell out fast.

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