The coastline of California extends from the soft sandy tropical beaches of San Diego near the Mexican border to the rugged northern coasts near Oregon. In the southern part of the state, warm Pacific waters and that famous California surf attract many tourists to its palm shaded beaches. As you go further north, the coastline becomes more scenic, but the waters are cooler and sandy beaches are scarcer. In northern California, hiking along rocky cliffs and visiting secluded beaches to see seals, sea otters or whales are more popular than swimming.