San Francisco's Marin Headlands
Some photos of the Marin Headlands. This area has many historical fortifications
and bunkers dating from before the civil war up to the cold war.
Battery Ridge / Spencer:
An pair of 1870s gun battery high above the Golden Gate. Interestingly
enough, the roof of the base-end station was made of glass circles embedded
in concrete. It looked a lot like the skylights into the Seattle underground.
Battery Orlando Wagner:
This one had a few underground magazines and tunnels, including one
with a homeless occupation.
Battery Construction 129:
This fort was started just before WWII and intended to be armed with
16" naval cannons. The site consists of an extensive tunnel system, rangefinding
station, a separate command station, a sub-level escape tunnel, and a separate
access tunnel through the hill behind it. The actual battery tunnels are
well sealed, but the access tunnels and gun turrets are open.
Another turn-of-the-century fort, deactivated before WWII.
Base End Stations:
These sites were the spotting and rangefinding stations that acted
as lookouts for the various forts. Several eras are represented in these
structures scattered throughout the hills. Some sites were combined base
end stations for multiple gun batteries, and some fed ranges to only a
Mine Casemate 1:
This large artificial hill hides a number of underground rooms. The
site controlled a number of ocean mine fields around the Golden Gate, turning
them off for known traffic. Later it may have been converted for use as
a fallout shelter, there was asystem of gas filters and a sign listing
shelter capacity. I don't know what the building outside the bunker was
for, although it had a number of communication cables entering the basement.
One of the few accessible bunkers, and popular with the taggers. I
used this one to play with my new remote flash. This one was built in 1905
and armed with dissapearing cannons to attack enemy ships. The fort was
deactivated in WWII when it was considered obsolete.
Battery Wallace. The underground magazines were originally constructed
in 1917, with the huge overhanging gun casemates added in 1942.
A mortar battery, and two deer.
The Nike museum (SF-86) and the SF-87 radar site atop Battery Construction
I don't know what these are, the last two could be storage tanks of
some kind. The first is one of two bunkers that didn't appear on my maps,
I believe they were shell storage magazines.