From the World Heritage inscription:
The landscape in this park, situated in south-west New Zealand, has been shaped by successive glaciations into fjords, rocky coasts, towering cliffs, lakes and waterfalls. Two-thirds of the park is covered with southern beech and podocarps, some of which are over 800 years old. The kea, the only alpine parrot in the world, lives in the park, as does the rare and endangered takahe, a large flightless bird.
Milford Sound is one of the most beautiful places I’ve ever visited. I had the pleasure of going there after it had been raining for 24 hours straight. The rain created countless small waterfalls along the sides of the fjord.
View my complete list of UNESCO World Heritage sites.