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But the weather here was so nice that we went to Mare Island and the Marin Coast. Mare Island is a former navy shipyard that closed in 1996 and has been slowly falling apart since then. In it's heyday, it build a large part of the Pacific Fleet, the first aircraft carrier in 1911, and a lot of the Polaris and Poseidon submarines.
Here's a picture of the first nuclear missile sub, the USS Grayback.
And the buildings in the background today.
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Anyway, lots of great decaying tech and dilapidated buildings. The rest of the pictures are here.