Stuðlagil Canyon, located in East Iceland, is a hidden gem with stunning basalt rock columns and a beautiful blue-green glacial river. Formed by the powerful force of a glacial river, this natural wonder remained undiscovered for a long time until the water level decreased due to a nearby hydroelectric plant. Now, visitors can marvel at the unique beauty of the canyon, hike around the area, and even spot nesting birds during the spring and summer months.