Every day is a g'day if you find yourself Down Under. Australia boasts one of the most diverse ecosystems in the world with a whopping 40 identifiable and distinct eco-regions that range from rainforests and outback deserts to mangroves and the iconic Great Barrier Reef. A stay at the latter may require a boat or helicopter, but even that trip is nothing short of spectacular with over 900 islands to see either from above or among its lapis water-lined cays.