I had been in Milford Sound twice, but never in Doubtful Sound, ad the reason was the higher price of the latter. When I ended up visiting Doubtful Sound I was even more impressed than with Milford Sound, because this one is three times bigger, and moreover you have an amazing trip across Manapouri lake, which I didn´t think it was especially impressive from the shore. Once you cross most of the lake you understand why people say it is that wonderful. Doubtful Sound is undoubtely worth it parying for the trip, as you won´t get to see something like that anywhere else in a warm place of the Southern Hemisphere
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