The Rutshellir Caves in South Iceland are a fascinating find by the Eyjafjöll mountains, featuring ancient man-made caves with intriguing legends attached. One cave, known as Rútshellir or the Cave of Rútur, is said to have been home to a mysterious figure named Rútur, with tales of betrayal and revenge swirling around his demise. Visitors can explore the arched main cave, once used for various purposes like storage and possibly even habitation. Keep an eye out for the carved cross and soak in the eerie atmosphere of this unique historical site.