The topography of France is diverse, featuring a mix of mountains, plains, and coastlines. The Alps in the southeast are the highest mountains, including Mont Blanc, the tallest peak in Western Europe. The Pyrenees form a natural border with Spain to the southwest, while the central region consists of rolling hills and plateaus. In addition to mountains, France has extensive river systems, including the Seine, Loire, and Rhone. The northern and western parts are characterized by flat plains, such as the Paris Basin, which support agriculture. The coastline along the Atlantic Ocean and Mediterranean Sea features sandy beaches and rocky cliffs.