There are ships buried under San Francisco! Lots and lots of ships. Apparently during the Gold Rush crews would sail their ships into the bay and then abandon them to head off and try their luck in the Sierras. The ships would just sit there, eventually getting silted in and, over time, buried. The ships had great names like Edwin and Elmira, and Brilliant and Noble.
Speaking of ships, a few weekends ago we got together a group for a sunset sail. I brought sailor and pirate hats for everyone and we took off on the Bay Lady. And a regal vessel she was. She had booze aboard, too - bonus.
We even got to steer!