Selgil Hot Spring in Húsafell, Iceland is a 4-mile loop trail that takes you through a majestic canyon with hot water sources for heating and bathing. The trail offers beautiful waterfalls and a relaxing hot spring at the end. It's a moderately challenging hike, but totally worth it for the stunning views and the chance to soak in some natural hot springs. Just watch out for tricky river crossings and enjoy the peaceful surroundings of this hidden gem in Western Iceland!