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.
Anyway, lots of great decaying tech and dilapidated buildings. The rest of the pictures are here.