Mount Hekla is located in the highly active ‘volcanic zone’ along the south shore and is the most active volcano in Iceland with more than 20 eruptions since 874. Hekla means ‘hooded,’ named after the clouds that obscure the summit. In ancient times Hekla was believed to be the entrance to the netherworld. This is where the phrases, ‘Go to Heck’ and ‘What the Heck?’ originated.