Micronation

"A micronation is an entity created and maintained as if it were a nation and/or a state, and generally carrying with it some, most or all of the attributes of nationhood, and likewise generally carrying with it some of the attributes of statehood. Though a micronation may well have begun as a mere drollery, it has the potential (given the evolution of a sufficiently vital national culture) to develop into a true nation, and possibly to achieve statehood."

-Peter Ravn Rasmussen

There are many self proclaimed micronations in existence. These include:

• Talossa
• Sealand