Stuðlagil Canyon is one of Iceland's most beautiful and unique natural attractions. Located in a glacial valley on the east side of the river, this area boasts the country's largest collection of columnar basalt formations. Visitors can enjoy the stunning view from the official viewing point, or get an even better view by taking a 2.5 mile (4km) hike to the opposite side of the river. With its many photo opportunities and natural beauty, Stuðlagil Canyon is a must-see attraction for any trip to Iceland.