Nauthúsagil is a hidden gem in South Iceland, tucked away beneath the famous Eyjafjallajökull volcano. It's a narrow ravine that used to be home to an abandoned estate called Nauthús. The ravine is known for its wild rowan trees and beautiful waterfalls. You can hike through the ravine, but watch out for slippery rocks! There are chains and ropes along the walls to help you navigate. It's definitely worth a visit if you're exploring the South Coast of Iceland.