The TranzAlpine is a passenger train operated by The Great Journeys of New Zealand in the South Island of New Zealand over the Midland Line; often regarded to be one of the world's great train journeys for the scenery through which it passes (see famous trains). The journey is 223 kilometres (139 mi) one-way, taking almost five hours. There are 16 tunnels and four viaducts, with the Staircase Viaduct elevated as much as 75 metres (246 ft). The TranzAlpine service was suspended in 2020 and again in 2021 because of the COVID-19 pandemic, but resumed on 14 January 2022.