Milford Sound is one of the highlights of New Zealand, and the only way to see it is by helicopter, or by cruise. It was formed by a glacier, so it should be called a fjord instead of a sound (apparently!), but it is basically a big body of water, surrounded by enormous, lush green mountains, with waterfalls cascading down from above from every direction. Not the most exciting thing I've ever done, but a perfect sample of the country's outstanding natural beauty. The best thing was the underwater observatory. In only 3 places in the world, there are areas underwater where the sealife of the ocean is replicated inland, as here the seawater is trapped by a layer of freshwater on top. The one here is the most accessible of the three. So we walked
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