Sealand is a self-claimed country in the North Sea approximately 12 km from the coast of Suffolk. Sealand is a structure called Roughs Tower it was built in the sea by the British Royal Navy, and later became Sealand. It is very small. There is only room for 300 people on it. Even though a man named Michael Bates says Sealand is a country, no other country has supported this claim.