Borgarvirki
A quick and tempting diversion can be found by taking Route 717 off Route 1 and driving 9 km (just under 6 miles) to Borgarvirki, an outstanding natural fortress made of basalt strata. Standing 177 meters (580 feet) above sea level with superior views over the vast plains, you can let your imagination run wild here. Legend has it that Vikings once used this geological wonder as a real fort.