Map of Sealand and the United Kingdom — Image Source: Wikipedia CC BY-SA 3.0) History Built in 1943 as part of the Maunsell Forts, Roughs Tower was a World War II defense platform protecting ... Sealand, or the Principality of Sealand, is a micronation located in the North Sea about 7.5 miles from Suffolk, England. Sealand is the home of Roughs Tower, which was used as a gun platform by the British in World War II. Is Sealand a Country? Sealand even has its own flag. Sealand is the name of a claimed microstate located on Roughs Tower, a World War II naval base in the North Sea. Although the Bates family has attempted to have Sealand classified as an independent sovereign state, it is classified as an artificial island. Sealand, a micro nation in the North Sea is the world's smallest country, smaller than a football field. Check for more details below.