Sealand is the world's smallest country with its own flag, stamps, currency, national anthem and passports. Seven miles off the east coast of England, it's a fort built during WWII on two concrete towers in the North Sea.
A retired army major by the name of Paddy Roy Bates squatted on it with his family and declared it a principality. The Royal Navy tried to evict them to no avail and the patriarch and his son were held prisoner by German and Dutch businessmen for three days in the 1970s before they could escape to Britain.
Bates now lives in Spain and his son Michael, I mean Prince Michael, is now thinking of selling. If buying a country is not in your budget, you can become a Lord, Lady, Baron or Baroness of the micro-nation by forking over 20 pounds.