Root Cellar

Dig a deep enough hole, and you’ll find that the ground is cool (and often moist). Root cellars tap into those cool, moist soil conditions and use them to store produce – like your refrigerator produce bin.

"Mini": Covered Holes

https://www.motherearthnews.com/diy/garden-yard/root-cellars-zm0z11zkon

For Warmer Climates

• http://alanbishop.proboards.com/thread/6084/hot-climate-root-cellars
• https://www.survivalistboards.com/showthread.php?t=25078&highlight=cellar

• https://waldenlabs.com/how-to-build-a-root-cellar-in-7-steps/