The south Island

The South Island or Te Waipounamu is the larger of the two major islands of New Zealand, the other being the smaller but more populous North Island. It is bordered to the north by Cook Strait, to the west by the Tasman Sea, and to the south and east by the Pacific Ocean. The South Island covers 150,437 square kilometres

Tourism is a huge earner for the South Island. Popular tourist activities include sightseeing, adventure tourism, such as glacier climbing and Bungee jumping, tramping (hiking), kayaking, and camping. Numerous walking and hiking paths such as the Milford Track, have huge international recognition.

An increase in direct international flights to Christchurch, Dunedin and Queenstown has boosted the number of overseas tourists.
he South Island of New Zealand has become one of the most popular tourist destinations due to its various natural attractions — magnificent fjords, splendid beaches, breath-taking glacier-carved mountain ranges, and diverse flora and fauna.

South Island is known for its adventure tourism, where the bold and daring can try bungee jumping, glacier climbing, skiing, hiking, camping, and kayaking. It has several hiking paths, with the Milford Track as the most recognized, where visitors can take a walk and indulge in the lushness and abundance of the sights around them.
Christchurch is the largest city in South Island. It has a flourishing ecosystem that boasts of a wide array of wildlife. There’s the Willowbank Wildlife Reserve, for instance. It offers visitors a glimpse of New Zealand’s many different wildlife such as wallabies, kiwi birds, water eels, lemurs, and keas. There’s also the Christchurch Botanic Gardens where native New Zealand flora grow, with the Avon River adding to the exotic feel of the whole environment.
The Fiordland National Park, which is among the largest national parks in the country, is also located in South Island, covering an area of 12,500 square kilometers. This world heritage site enables tourists to get a good view of one of the country’s highest mountains, the Mount Aspiring/Tititea.

On South Island’s west coast, there is a small district where visitors can go to revel in the rich natural scenery of the surroundings. The place is called Punakaiki, home to the renowned Pancake Rocks and Blowholes. These pancake-like limestone formations were formed around 30 millions years ago through the solidification of various compounds, and seismic activities. Visitors have the option to join an organized walk to see the landscape, blowholes, and surge pools up close.
Source
Wikipedia.