San Luis Obispo CountyHidden Spots in San Luis Obispo County Dune Hazard Trail/Canyon Reef Pirate’s Cove Black Hill Trail Montaña del Oro Bluff Trail Dorn Pyramid Nitt Witt Ridge Hearst Castle San Luis Obispo Botanical Garden Madonna Inn Eberle Winery Cal Poly Architectural Graveyard Bubblegum Alley Avila Valley Barn