There's a 3x3 km island in the middle of the Baltic Sea with no name - Apparently.
The island, located about 1.5 km off the coast of Sweden, has been uninhabited since the 19th century. It's a small, rocky outcropping that's occasionally visible above the surface of the water due to low tide. Despite its proximity to the Swedish mainland, the island has no official name and is not marked on most modern maps. The Swedish Coast Guard has identified the island, but it remains a mystery to the rest of the world.