One of the strangest geographical entities is the Sargasso Sea. Located in the North Atlantic Ocean, it is the only sea in the world that does not have any land boundaries or shores. Instead of being defined by coastlines, it is defined by four ocean currents: the Gulf Stream, the North Atlantic Current, the Canary Current, and the North Atlantic Equatorial Current. This system of currents, known as the North Atlantic Gyre, traps a vast amount of Sargassum (a type of seaweed) in its center, creating a distinct, calm, blue ecosystem. It is famous for its exceptionally clear water and as a vital breeding ground for eels, despite having no land to anchor it.