Iceland is an extensive island (18th largest in the world) and country lying on the divergent plates of the Atlantic Trench, therefore it hosts large-scale geothermal and volcanic activity. Not far from Greenland, its coastline is being eroded by the waves of the North Atlantic Ocean. Its coastal plain is indented with fjords.
Iceland’s highest summit is Hvannadalshnjúkur, with an elevation of 2.110 meters (or 6852 feet) above the level of the ocean. The largest glacier of Europe, the Vatnajökull, together with several other considerable size glaciers cover more than 10% of Iceland's territory.
Iceland does not have very long rivers, most of the rivers spring in the central mountains and glaciers, and towards the ocean in all directions. Just like the longest river Þjórsá, or the second longest river, Jökulsá á Fjöllum.