Downpull Vaults
Buried Vitravale structures where Gravity disturbances make excavation, orientation, and movement unreliable.
Some rooms sit at angles the surface does not share. Heavy objects may settle against walls that visitors instinctively call vertical.
Field practice
Arrows are written on more than one plane, dropped tools appear in unexpected corners, and old doors can open in directions ordinary architecture has no reason to use.
Access
Permits move slowly because structural surveys can change quickly. Private expeditions are not equally patient.
