The pristine waters of New Zealand's Doubtful Sound aren't the only natural element that help to make it a must-visit destination in the Fiordland region - the lush native bush and dense green forests that surround it, along with a series of walking tracks that traverse them, provide another great way to get the most out of New Zealand's amazing nature! Join a walking tour and you'll come across a wide range of natural features and highlights including energetically flowing streams and cascading waterfalls - one of the most famous of which is the much-acclaimed Routeburn Walking Track.