See with no land

The Sargasso Sea is a region in the middle of the North Atlantic Ocean, surrounded by ocean currents, and this is the only sea that has no coast. It is bounded on the west by the Gulf Stream, on the north, by the North Atlantic Current, on the east, by the Canary Current, and on the south, by the North Atlantic Equatorial Current. This system of currents forms the North Atlantic Subtropical Gyre.

The Sargasso Sea is roughly 700 statute miles wide and 2,000 statute miles long (1,100 km wide and 3,200 km long). It stretches from roughly 70 degrees west to 40 degrees west, and from 25 degrees north to 35 degrees north. Bermuda is near the western fringes of the sea. The Sargasso Sea is the only "sea" without shores. The ocean water in the Sargasso Sea is distinctive for its deep blue color and exceptional clarity, with underwater visibility of up to 200 feet (61 m).