Pheasant Island, a small, uninhabited piece of land in the Bidasoa River between France and Spain, is perhaps the most unique geopolitical location on Earth. Due to the 1659 Treaty of the Pyrenees, ownership of the island alternately changes between the two countries every six months. Without a permanent population or a consistent governing administration, the island represents one of the oddest examples of bi-national agreements in history. It is an intriguing, well-documented reminder of the lengths countries will go to maintain peaceful relations, resulting in this curiously peaceful territory swap.
