Large cylindrical structure was seen at the top of mountain adjacent Montara State Beach area in the vicinity of Montara CA.

While travelling North on Highway 1 (Cabrillo Highway) along the Northern California coast, as we rounded a bend in the highway we spotted a large, cylinder-shaped “structure/object” at the top of one of the mountains in close proximity to another (man-made) structure. At first, it appeared this structure was some sort of large parking garage as it had a cork screw pattern running up its side. It was tall, completely smooth and a cylinder in shape. It was white with a black stripe moving up the structure in a cork screw pattern. At the top of the structure were a number of smooth silver cylinders that were capped with smooth silver spheres. To the right of the silver cylinders was some sort of object appearing to hang over the edge of the structure. Unfortunately, I didn’t get a good look at this hanging object. The structure was tall and looked very out of place for the surroundings which is why we first noticed it. Both myself and the other witness studied the object for one to two minutes before our attention was momentarily drawn to the surrounding highway traffic. When I looked back to continue looking at this cylindrical object, it had vanished and was nowhere to be seen. As we rounded the mountain where the cylinder had been, we could see the backside of the mountain which was vacant with no indication any type of structure/object had been there.