Natural Bridges State Beach is a 65-acre California state park in Santa Cruz, California in the United States. The park features a natural bridge across a section of the beach. It is also well known as a hotspot to see monarch butterfly migrations. The Monarch Butterfly Natural Preserve is home to up to 150,000 monarch butterflies from October through early February.
Natural Bridge
Natural Bridges State Beach
As you can see, this is a great place to hang out during the butterfly off season, too. 
Playing at Natural Bridges State Beach
One more shot of the beautiful Natural Bridge
Little Girl and Ocean