The unrecognised Principality of Sealand is located..?
On the anti-aircraft gun platform. The Principality of Sealand is an unrecognised self-declared state (or micronation) located on a British-built platform in the North Sea. Its mass consists of HM Fort Roughs, a former Second World War Maunsell Sea Fort, off the coast ofSuffolk, England, United Kingdom. While it has been described as the world's smallest country, Sealand is not officially recognised by any established sovereign state.