This place had been on my list for a while and I finally got a chance to check it out. One man, Baldassare Forestiere, tunneled in and under the hardpan on his property for many acres to create rooms and gardens of fruit trees and vines. The earth and the shade moderates the wide temperature swings of the Central Valley, allowing Baldassare to grow plants that normally couldn’t grow in that location. His underground rooms stayed comfortable as well. I cant write more but here it a link to the Website for more info.
deedsdesign 