Jökulsárgljúfur, located in the north of the main island, is Iceland’s largest canyon. It hosts several interesting features, including three waterfalls, and has some excellent hiking opporunities. Geology and Formation Jökulsárgljúfur was formed during a catastrophic flood of the river Jökulsá, creating a 25-km / 15.5-mile long, 0.5-km / 0.3-mile wide canyon that sometimes has…