Tucked in the wilds of southeast Iceland, Fjaðrárgljúfur is a dramatic mossy canyon stretching over two kilometers with sheer 100-meter walls that plunge into a winding river below. Created by glacial meltwater and erosion over thousands of years, this ethereal ravine offers some of the most striking hiking trails in the country, leading through lush greenery and past rocky outcrops with panoramic views. Just a short detour off Route 1 near Kirkjubæjarklaustur, it's close to the Lakagígar crater row and the magical waterfalls of Foss á Síðu and Systrafoss. Though fragile and temporarily closed in the past for ecological recovery, it remains a testament to Iceland’s raw natural beauty.