I wish I was one of those aloof authors who are somehow above paying any attention to rankings or reviews, but that's just not true. My palms always start to sweat at this stage.
I woke up to this from the UK:
#3 in Kindle Store > Books > Literature & Fiction > Action & Adventure > Travel
#16 in Kindle Store > Books > Literature & Fiction > Historical Fiction > Australian & Oceanian
You can purchase your own copy of Adventures Downunder here (and if you can purchase it at Amazon UK, all the better!! [Squeee!!])