Greenland's coastline is formed by mountains, with long deep fjords.
The ice cap lies behind the coastal ranges, in the bowl-shaped interior.

In contrast to the towering ancient mountains on the coast, the ice is always in motion. It flows outward in all directions, pushed down by its own weight. When the pressure at the end of a glacier becomes too great, huge icebergs are sent crashing into the fjords. During the summer, the surface of the ice cap transforms into a diverse landscape of turquoise lakes and rivers, and under the surface, the rushing melt waters create enormous caverns and deep icy subterranean chambers.