Stretched out across 3.5 miles of beautiful coastline, Crystal Cove is one of the last oceanfront nature preserves left in Southern California. In addition to swimming, surfing and kayaking the crystal blue waters, visitors can stroll the sandy beach, explore tide pools, jog or cycle along trails that meander through the canyon, and check out the Historic District, with 46 quaint beach cottages preserved from the 1920s and ‘30s.