Courchevel Airport, France: Perched on the side of a cliff 6588ft up in the French Alps, this airport famously featured in the James Bond film Tomorrow Never Dies. Pilots have to navigate its short, uphill runway that ends in a terrifying vertical drop. And then there's all that ice and snow, plus the odd blizzard to contend with. Luckily, the average holidaymaker won't have to experience this heart-in-mouth take-off as only private planes can land here.