The Ilulissat fjord goes west 40 kilometers from the Greenland icecap to Disko Bay, close to Ilulissat town. At its eastern end is the Jakobshavn Isbrae Glacier, the most productive glacier in the Northern Hemisphere. The glacier flows at a rate of 20-35 metres per day, resulting in around 20 billion tons of icebergs breaking off and leaving the fjord every year. On breaking up the icebergs come out into the open sea and at first, they travel north with ocean currents. Soon, they start turning south and they go into the Atlantic Ocean. 