Antarctica is a land of ice, 99% of the continent is covered by ice up to 3 miles thick in places. It is the highest, driest, windiest and coldest continent on earth. Even though Antarctica is mostly covered by ice, there is also a lot of rock exposure, where igneous, sedimentary and volcanic rocks can all be found. In some key locations there are also fossils to be found. The most dramatic geological feature of the Antarctic Peninsula is undoubtedly the active volcano of Deception Island, which is one of only two places in the world where a ship can sail into the caldera of an active volcano.