October 2025
dissatisfaction
1 day ago
dissatisfaction
1 day ago
Devil's Bunker
Abandoned Military in Half Moon Bay, California, United States
Nov 06 2025
| Recent status | Abandoned |
| Location # | 21660 |
Hazards of Devil's Bunker
- Climbing: You'll have to do a bit of climbing if you want to access the interior of the bunker. It's not exactly the safest set up for that - make sure you have a good grip and watch where you place your feet.
Devil’s Slide was the site of a World War II military observation and triangulation station, called Devil’s Bunker, which helped defend San Francisco Harbor. Before radar, soldiers used binoculars and compasses to spot ships and report their positions. By combining reports from several observation points, they could figure out a ship’s exact location through triangulation.
The site had six main structures: three concrete-and-steel pillboxes for observation, two concrete-and-earth bunkers, and a reinforced steel tower. One of the bunkers was used for communications and as a command post. After missile defenses made the station obsolete, it was abandoned.
The southernmost bunker was sold to a private owner in 1983. Parts of the structure are still visible, sitting on the peak, and the site is now fenced off.
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As of 10/27/2025, there is one point of entry.
- Either use the rope on one side and climb a bit to reach the window area or do a little scramble up the rocks on the other side. The latter is definitely the easier route. After this, you'll have to climb and crawl through the window to get in. Not possible if you're very tall or overweight.
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