The Garden Sub-Level was designed as a place where crops are grown and harvested for the Castle's occupants, while the resulting seed is stored/maintained for next season. Fresh water is collected via the natural sandstone filter in the ceiling, which slowly drips down into the deep central collection chamber.
Ventilation, sunlight, and some rain water is filtered down to the 80 foot tall chamber via two vertical Columnar Basalt shafts who's entrance is housed in twin open air buildings on the surface. These shafts have steep vertical stone steps, and while only the steadfast dare to use them on a regular basis, most prefer the twin Guard Tower stairs.
A grove of trees serves as a reminder of the deep connection to the Older Faith, while the outer walls keep the residents safe and secure during wartime. Other secrets remain...
Thus, presented below is the Garden Sub-Level: