Vatnajokull, also known as the Vatna Glacier, is the largest and most voluminous ice cap in Iceland, and one of the largest in area in Europe. It's located in the south-east of the island, covering more than 8% of the country. The average thickness of the ice is 400 meters, touching down to 1,000 meters at its thickest point. The area is very popular for sightseeing due to its large ice caves, many of which are only accessible with a guided tour.