Australia's transcontinental rail service, the Indian Pacific, is set to leave Adelaide after a 12-month break because of the COVID-19 pandemic.
The train will depart Adelaide on Thursday night bound for Perth.
Then on Sunday, it will leave Perth for the first full journey to Sydney since March last year.
The trip covers 4352 kilometres over three nights and four days with guests also experiencing a range of off-train excursions in locations such as the Blue Mountains.
Journey Beyond chief commercial officer Peter Egglestone said it would be exciting to see the Indian Pacific depart Adelaide for the first time in almost a year.
"We were extremely fortunate to celebrate the Indian Pacific's 50th anniversary in February 2020 before the various state border closures occurred in March," he said.
"The 12 months since represents the longest period the Indian Pacific hasn't made its twice-weekly journeys across the country."
Mr Egglestone said with travellers becoming more confident, forward bookings for 2021 were strong.
More than 100 people will be on board for the leg to Perth, with the operators implementing a number of COVID-19-safety measures.
That includes physical distancing, health screening, temperature checks, varied dining experiences, additional staff training and a cap on guest numbers in certain spaces.
Australian Associated Press