Grebe valley towards Doubtful sound

Doubtful Sound is a very large and naturally imposing fjord (despite its name) in Fiordland, in the far south west of New Zealand. It is located in the same region as the smaller but more famous and accessible Milford Sound. It took second place after said Fiord as New Zealand's most famous tourism destination.

Fiordland National Park occupies the southwest corner of the South Island of New Zealand. It is the largest of the 14 national parks in New Zealand, with an area of 12,500 km², and a major part of the Te Wahipounamu World Heritage site. The park is administered by the Department of Conservation.

Te Wāhipounamu (Māori for "the place of greenstone") is a World Heritage site in the south west corner of the South Island of New Zealand. Inscribed on the World Heritage List in 1990 and covering 26,000 km², the site incorporates several National Parks:

It is thought to contain some of the best modern representations of the original flora and fauna present in Gondwanaland, one of the reasons for listing as a World Heritage site.