A stunning journey in New Zealand, through the heart of South Island's best scenery. It starts in Greymouth, renowned for its coal mining past, moving on to Arthur's Pass National Park - with its historically important Maori hunting grounds. The train passes through Cass, made famous by Kiwi artist Rita Angus and onwards to the Waimakiriri gorge and its 15 tunnels and four viaducts. Rail engineers recall how the line has been affected by earthquakes before the journey arrives in Christchurch, a city sitting on a volcano.