The Old U.S. Mint ('The Granite Lady') reported hauntings

The Old U.S. Mint in San Francisco, nicknamed 'The Granite Lady' for surviving the 1906 earthquake, appears in local ghost-tour literature and press accounts where visitors and guides report unexplained footsteps, voices, and a sense of presence in parts of the building. These accounts are anecdotal and have been included in histories and tour narratives rather than established scientific studies. The building is a documented historic site with extensive archival records of its role in 1906 and afterward.