Also worth mentioning Baldassare Forestiere, who spent about 40 years digging an extensive network of tunnels in Fresno, CA. https://en.wikipedia.org/wiki/Fore

Also worth mentioning Baldassare Forestiere, who spent about 40 years digging an extensive network of tunnels in Fresno, CA. https://en.wikipedia.org/wiki/Forestiere_Underground_Gardens https://en.wikipedia.org/wiki/Forestiere_Underground_Gardens