When researching sustainable buildings for cultivation, we came across a plan for an underground greenhouse, or as the Benson Agriculture and Food Institute (Benson Institute) called it, a "walipini."
The walipini, as designed by the Benson Institute, was specifically engineered for the area of La Paz, Bolivia. As a result, the name for the underground greenhouse is derived from the Aymara Indian language and means "place of warmth."
The design intelligently utilizes the earth’s resources to provide a warm and stable temperature year-round. The walipini harnesses geothermal heat generated 6-8′ below ground, in addition to, solar energy which penetrates through a solar roof.
For more information about underground greenhouses, zero-energy growing and walipini construction, see the walipini manual here