The Worst Journeys You've Undergone

I'm currently living in Australia, coming back home to the UK for the first time in almost a decade this year. A flight from Sydney to Edinburgh would take 55 hours - twice as long as 10 years ago. And I have the pleasure of a 10-hour train trip every time I go to visit my parents. So the longest journey or the worst journey you've endured? Share your stories with CNN iReport.