Australasia is often defined as being composed primarily of Australia, New Zealand, Papua New Guinea as well as the adjacent islands. Most of Australasia is also considered part of Oceania, but is sometimes excluded for being too "continental".
Australia and New Zealand are both former British colonies. At one time it was envisaged that the two colonies would become a single country and the Australian constitution still permits New Zealand to join as another state. The two countries enjoy a Closer Economic Relationship (CER) with free trade and relatively unrestricted travel. Both countries are working on joint national standards, with notable progress being made in unified food legislation.
Although these two countries work closely together in many respects, they have differing political directions, both internally and externally, and present sometimes opposing outlooks on the world. The prospect of a stronger political union seems unlikely at present, though both countries co-operate readily across a wide range of issues.
Papua New Guinea was, at one time, a United Nations trusteeship, administered by Australia.
English is the official language spoken in Australia and New Zealand.
Maori is an official language in New Zealand. Many New Zealand placenames are of Maori origin. Mispronouncing these names is easily done by English speakers unfamiliar with Maori and will often render the name unintelligible to New Zealanders. While relatively few New Zealanders speak Maori conversationally, (though many are learning), almost all of them cringe when Maori placenames are mispronounced.
Other travel topics
Travelling by car
Travelling by airline