Milford Sound, which is really a fjord, is the crown jewel of Fiordland National Park and a UNESCO World Heritage site. Its vertical cliffs covered in verdant rainforests provide a breathtaking backdrop to thundering waterfalls, misty rainbows and the tannin-stained waters of the fjord. Milford Sound receives an amazing 22 feet of precipitation annually, yet there are only two permanent waterfalls, Lady Bowen and Sterling Falls. Rising upwards of 5,555 feet, the iconic landmark of Milford Sound is Mitre Peak, named for its resemblance to a bishop's hat, known as a mitre. Five individual peaks create its distinctive shape.