"Every day thousands of passengers on underground streetcars in San Francisco pass through the hull of a 19th-century ship without knowing it"

NG:

Likewise, thousands of pedestrians walk unawares over dozens of old ships buried beneath the streets of the city’s financial district. The vessels brought eager prospectors to San Francisco during the California Gold Rush, only to be mostly abandoned and later covered up by landfill as the city grew like crazy in the late 1800s.

Now, the San Francisco Maritime National Historical Park has created a new map of these buried ships