Sealand  is a sea fort in the North Sea, located 10 km off the coast of Suffolk, England. It is best known for its (unrecognized) claim to be the world's smallest sovereign nation. However, it is currently regarded as a micronation by most non-Sealanders.
Long entirely off-limits to tourists, the U.K. travel company Church & East now take booking for visits for groups of 1-5 people. An entry visa costs $100 Sealand dollars (£50), the return transfer from Suffolk SX$120 and a day trip/one-night/two-night stay (full board) SX$100/200/300 per person.
Walk. The entire habitable area of the fort is 550 sq.m.
The sea, the fort and the English coastline.
With panoramic views of the Ocean, staring at the ocean is a major pass time in Sea land. You could also engage in the famous walking "The Perimeter" or even take part in the ancient ritual of drinking "Tea" which was bought to Sea Land in around 3000 BC by the Ancient Egyptians.
Online Sealand has a comprehensive catalog of all things Sealand. This includes Tee-shirts, stamps, and even lordships.
Often flounder can be found beached on the platform, this serves as a magnificent feast for the locals. They also engage in the consumption of "microwave dinners."
Unless you're planning to swim your way to the coast, you'll get out the same way you came in: By helicopter.