High a-top Wolf Ridge in the Marin Headlands sits what remains of Integrated Fire Control facility SF-88C. Otherwise known as "Hill 88". During the Cold War era the US military set up Nike Missile sites around many parts of the United States. These surface-to-air missiles where intended to protect against attacks by enemy bombers. The Marin Headlands was graced with two of these instalations, and the conntrol site was located on Wolf Ridge. There isn't much left today, but the view (on a clear night) is second to none, so it's worth the almost 4 mile hike.