Hercules
There are several versions of the legend of Hercules forming of the Pyrenees. The one I’ve read recently involved Atlas and Hercules – two of the most powerful gods. Atlas lived happily in his city of Atlantis. He had a peacful and placid caracter. Hercules on the other hand was violent and cruel and naturally they were enemies.
Atlas had a daughter Pirene who was the most beautiful of the goddesses. When Hercules saw her he wanted her for his wife and with his power he was used to getting what he wanted. But Pirene loved her father and would never take one of his enemies for a husband. Hercules flew into a rage and cleaved with his axe what we know call the Straits of Gibralter, allowinging the seas of the Atlantic Ocean to flood Atlantis and creating the Mediteranean Sea.