Hengill is a massive volcano in southwest Iceland, known for its geothermal activity and hot springs. Despite not erupting for 2,000 years, it still steams and bubbles with energy. This volcano powers Iceland's electricity and heating needs, making it a crucial source of renewable energy. Hikers can explore the nearby Reykjadalur valley for a relaxing soak in natural hot springs. Plus, the town of Hveragerði offers a unique dining experience where chefs cook by burying food in the earth's heat. Overall, Hengill is a fascinating destination that showcases Iceland's geothermal power and natural beauty.