Devil's Slide Hanging Bunker

A view of the bunker from the north side. All pics sourced from Atlas Obscura. 

In Pacifica CA, there is an abandoned military bunker on the beach of devil's slide that was another staple of my childhood, having visited it many times. However, it wasn't until much later in life that I was able to do some home work on the history of the place and what it was actually used for. 

It was originally built by the US Army Corps of Engineers immediately before WWII (in 1940) as one of a large series of buildings used for triangulation and observation. I couldn't find too much on it's triangulation duties, but I assume it was to assist with aircraft and ship navigation, possibly with various radio equipment. As for observation, it was also a station in which a watchman with optics would be a lookout for enemy shipping within visual range. In the event enemy activity is spotted, they would have assisted with spotting for the friendly coastal artillery batteries to the target. As technologies and needs changed after the war, the site was quickly shut down in 1949.

Another view from further north.

After the war, in the 1970s, the bunker and land was purchased by a private owner, and the land immediately surrounding the bunker was bulldozed off giving it the precarious and unstable look it has today. The land project that the bulldozing was needed for has yet to come to any fruition and it has now been covered with graffiti from trespassers. Unfortunately, the land is currently fenced off and is still private property, but can still be seen easily from the Devil's Slide trail and the nearby highway.

A close up view from the South side.