Australia, officially the Commonwealth of Australia, is a sovereign country comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands. It is the largest country in Oceania and the world's sixth-largest country by total area. The population of 26 million is highly urbanized and heavily concentrated on the eastern seaboard. Australia's capital is Canberra, and its largest city is Sydney. The country's other major metropolitan areas are Melbourne, Brisbane, Perth, and Adelaide.
Greece (Greek: Ελλάδα, Ellada, [eˈlaða]), officially the Hellenic Republic and also known as Hellas, is a country located in Southeast Europe. Its population is approximately 10.7 million; Athens is the capital, Inorthwest borders Albania to the northwest, North Macedonia & Bulgaria to the north, Turkey to the northeast. The Aegean Sea in east, the Ionian Sea to the west, the Cretan Sea and the Mediterranean Sea to the south. Greece has the 11th longest coastline in the world at 13,676 km (8,498 Mi), 227 islands are inhabited. Eighty percent of Greece is mountainous, with Mount Olympus being the highest peak at 2,918 meters (9,573 Ft).