Another interesting fact is that this volcanic rock was also the home to the Point Sur Naval Facility which was part of a network of defensive listening stations. According to the website they used to track and listen to Soviets submarines. Today it continues to function as the only Sound Surveillance System facility on the West Coast. I've passed this rock many times in my years and always wondered what went on and now I know! How about you?
Are there any places near your house that are a mystery to you?