These rock formations are revealed at low tides. You will see why they are called bowling balls. Don Hess captured this lovely sight near sunset as a storm was arriving.
To learn more about Bowling Ball Beach, which is part of Schooner Gulch State Park, here is the link: https://www.parks.ca.gov/?page_id=446
Thanks to Don for allowing me to share his photo with you here.
It's stormy here this afternoon - lots of dark clouds and some wind, but little rain yet.