According to local folklore, the rocks surrounding Eigerøy Lighthouse have grooves carved by the wheels of the carriage belonging to Thor, the God of Thunder. The modern explanation is that the fascinating lines in the rocks are a geological phenomenon formed when hot magma filled cracks in older rocks. This produces so-called dykes of a coarse grained rock called norite cutting through anorthosite. Come and find out more about the stories behind the Eigerøy Lighthouse area!