Don't you love the notion of travelling from one ocean to another on a train? That's one of the things that has always made the idea of a journey on the Indian Pacific so alluring for me. And after years of dreaming about it, I'm pleased we did it... well, part of it... the Perth to Adelaide sector. Australia's only transcontinental route, the Indian Pacific transports travellers some 4,352 kilometres from the country's most remote capital city, Perth, and the Indian Ocean, across this colossal land to Sydney, Australia's largest city, and the Pacific Ocean. Hence the name, the Indian Pacific. For Australians, it's one of those classic trips - like driving the Great Ocean Road or doing the Red Centre - one of our great journeys that every Aussie tries to do at least once in their life. Most save the trip for their retirement, so they can afford to do in style in Gold class. Others brave the Red service, where they can opt for snug sleepers or sit up for the entire three-day journey - yep, that's right three whole days. We were booked into Gold, but were upgraded to the new Platinum service, just recently introduced on the Indian Pacific. We were a tad disappointed (well, for a minute or two!) as we had wanted to compare the Gold experience with our previous trip in Platinum from Alice Springs to Darwin on The Ghan (read about that trip here) - all in the name of research for the guidebooks we're writing, of course. But it's hard to knock back the Platinum cabin's comfort and space - a whopping 3.65 x 2.1metres! - which makes the cabins feel like tiny hotel rooms. We did get to do a tour of the Gold sleepers and as comfortable enough as they look, the Platinum cabins can't be beaten. The space allowed us to sprawl out in the room, spread out our things, work at the table, and - once the beds are made in the evening (ever so discretely while we were at dinner), spread out on the bed and watch a DVD on the laptop. And the private bathroom with toilet, shower and sink is also hard to beat. Platinum is expensive though, around Aus $3,300 on the Indian Pacific (see all fares here), which is why many Australian travellers consider it a once-in-a-lifetime experience. I try not to think of travel in that way; I like to always think we can return to certain places one day. But I'm not sure how many times you'd want to spend three days on a train - as much as I like being able to say I've travelled from ocean to ocean across Australia on the Indian Pacific.