Up and Down and Back Again

A trip up to Queensland (the Gold Coast) a couple of weeks ago, followed by another trip to Queensland (this time Brisbane) a week later & I'm left wondering what it is about travel that is just so wearying! Despite all that sitting in airports and on planes and in cars, I feel like I've run a marathon (well, not quite). Why is it that doing nothing can be so tiring?

Perhaps it's something to do with being somewhere unfamiliar? Or maybe it's something to do with moving from one place to another and back again - your inbuilt body compass gets knocked around a bit?

Either way, there is something strange about being somewhere, a nice chilly 14 degrees, and knowing that a couple of hours ago you were somewhere else, 1000km away, where it was 30 degrees.