Located on the west coast of Greenland, 250 km north of the Arctic Circle, Ilulissat Icefjord is the mouth of the Selmaq Kujallek glacier, one of the few glaciers from the Greenland ice sheet that flows into the sea. Selmaq Kujallek is one of the fastest-flowing and most active glaciers in the world. It calves more than 35 cubic kilometers of ice each year, accounting for 10% of all ice calving in Greenland and more than any other glacier outside Antarctica. It has been studied for more than 250 years, helping us to deepen our understanding of climate change and ice sheet glaciology. The massiveness of the ice sheet and the loud sounds of fast-flowing glacial ice streams calving into the iceberg-covered fjords combine to create this exciting and awe-inspiring natural phenomenon.