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JScottRomero: Fly by. (Zoom in on the opening at the center.) Castle Rock State Park, Santa Cruz Mountains, Santa Cruz County, California.
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JScottRomero: Sandstone. Castle Rock State Park, Santa Cruz County, California.
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JScottRomero: How many faces do you see in the burls?
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JScottRomero: Sandstone. Castle Rock State Park, Santa Cruz County, California.