The Eyjafjallajökull glacier is a 1666 m. high glacier capped stratovolcano. It is one of the smaller glaciers of Iceland, situated to the north of Skógar and to the south and west of the much bigger glacier Mýrdalsjökull. The glacier covers a volcano, which has erupted relatively frequently since the Ice Age. The crater of the volcano has a diameter of 3-4 km and the glacier covers an area of about 100 km². The south end of the volcano was once part of the Atlantic coastline. As the sea has since retreated some 5 km, the former coastline has left behind sheer cliffs with a multitude of beautiful waterfalls. One should never venture onto the glacier without guides, as this is a very dangerous area for unexperienced visitors.