The Empire of Atlantium
Described by Lonely Planet as “a refreshing antidote to the reactionary self-aggrandisement of so many micronations,” the Empire of Atlantium is a “secular humanist utopia” founded by three Sydney teenagers in 1981 in New South Wales, Australia.
Atlantium has nearly 3,000 so-called dual-citizens (they live in over 100 countries). One of the founders, George Francis Cruickshank, has ruled as Emperor George II since its foundation.
Spanning the eastern coast of Spain, Catalonia remains part of the country despite immense patriotism and nationalistic movements fighting for its independence. The region has its own language, flag, and government, and is most famous for its largest city of Barcelona.
Technically an autonomous country in the Danish Realm, the world’s largest island is not its own country. Despite having its own language, flag, culture, and a fair level of autonomy, Greenland remains under Danish control.
Fun fact: the United States offered to buy Greenland from Denmark in 1946 for $100,000,000, but Denmark refused to sell.