Huntington Beach is a California city southeast of Los Angeles. It's known for surf beaches, such as Huntington City Beach, with its long Huntington Beach Pier. The International Surfing Museum displays longboards and other memorabilia. Sprawling Huntington Central Park features fields, gardens and lakes, plus an equestrian center. Bolsa Chica Ecological Reserve's wetlands and dunes shelter hundreds of bird species. Huntington Beach (locally initialized "HB") is known for its long 9.5-mile (15.3 km) stretch of sandy beach, mild climate, excellent surfing, and beach culture. The ocean waves are enhanced by a natural effect caused by the edge-diffraction of open ocean swells around Santa Catalina Island.Swells generated predominantly from the North Pacific in winter and from a combination of Southern Hemisphere storms and hurricanes in the summer focus on Huntington Beach, creating consistent surf all year long, hence the nickname "Surf City".