Fresno, CA: the Forestiere Underground Gardens. underground caverns and tunnels by the Sicilian immigrant, Baldassare Forestiere. In 1923, Forestiere had carved out over 10 acres of connecting tunnels, rooms, patios, grottos and a simple earthen home that sheltered him from the Fresno heat. Reminiscent of the ancient catacombsunderground. Carrying on the Forestiere family legacy, the Forestieres have opened up the underground tunnels for all to explore and experience.