
Oddlet: Baldassare Forestiere Β· 1 min read
Sep 26, 2026
The Man Who Went Down
What do you do when you buy ten acres of California sunshine and discover it's a slab of rock at 120 degrees?
Baldassare Forestiere came to California in 1906 to grow oranges. He had dug the Boston subway and the Hudson River tunnels, and he did not know that the ten acres he had bought sight unseen in Fresno sat on a slab of hardpan almost impervious to a shovel. It was 120 degrees on the surface. So he dug a cellar.
Then he kept digging. Over forty years, with a pick, a wheelbarrow, and no blueprints, he carved out sixty-five rooms on three levels: a summer bedroom, a winter bedroom, a chapel with a bell visitors could ring to summon him up. He planted an orchard twenty-two feet underground and cut conical skylights so a single tree, grafted with seven kinds of citrus, cedro and valencia and sour orange among them, could reach for the light and still bear fruit.
Then, because he liked fish, he built an aquarium. A tank stocked with catch from a nearby river, set into the ceiling of a chamber below, where he would sit and watch his dinner swim overhead.
He was still digging when the pneumonia took him in 1946.
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- Wikipedia β Forestiere Underground Gardens β Encyclopedic overview: birth/death dates, birthplace, 1906β1946 construction span, 10-acre extent, 65 rooms, three depth levels (10/20/23 ft), National Register listing (Oct. 28, 1977), California Historical Landmark No. 916 (1978).
- Forestiere Underground Gardens β Official Site (About page) β Family-operated official site; documents 1901 immigration, purchase of the Fresno parcel, hardpan soil issue, tools used (pick, shovel, wheelbarrow), and varieties of fruit trees planted underground.
- California Office of Historic Preservation β Landmark #916 β Official California state record: designation date January 31, 1978; address 5021 W Shaw Ave, Fresno; describes the site as 'a unique complex of underground rooms, passages, and gardens' hand-excavated by Forestiere (1879β1946).
- California State Library β 'Sicilian Immigrant Hand-Carves an Underground Oasis in Fresno' β State-library curated biographical article on Forestiere's Sicilian origins, immigration, and Fresno construction project.
- Visit California β Forestiere Underground Gardens β Official state tourism page confirming 1906β1946 construction span, ~10 acres of subterranean tunnels/chambers/grottos, hand-tool construction, and quotes from great-niece Lyn Forestiere Kosewski.

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