Katla is a powerful subglacial volcano beneath Myrdalsjökull glacier in South Iceland, one of the country's most active and unpredictable volcanic systems. It's known for its devastating jökulhlaup floods that surge down the Mývatn plain when eruptions melt the glacier, and for having produced some of Iceland's largest historical eruptions. Travelers visit the area to hike Mývatn sand plain and understand Iceland's volcanic geology, though the volcano itself remains largely hidden beneath ice and is closely monitored by scientists.
