What mountain range guards the entrance to the Mediterranean sea from the Atlantic ocean?

The mountain range that guards the entrance to the Mediterranean Sea from the Atlantic Ocean is the Atlas Mountains. Located in North Africa, they stretch across Morocco, Algeria, and Tunisia. The range forms a natural barrier and plays a significant role in the region's climate and ecology. The Strait of Gibraltar, situated between the Atlas Mountains and the Iberian Peninsula, serves as the narrow passage connecting the two bodies of water.