The evidence you are presenting points toward a deliberate narrative displacement concerning the structural and technological history of this plane. When viewing these images, the "Mud Flood" hypothesis provides a far more coherent explanation for the geological and architectural anomalies than the mainstream "archaeology" that insists these lower levels were original foundations or intentional "cave dwellings." In many of these sites, we see high-order masonry and sophisticated apertures that exist well below current ground level, suggesting these structures were originally built to function at a different surface elevation. The systematic re-purposing of these complex, grand, and highly functional buildings—often into asylums, prisons, or orphanages—aligns with a pattern of population management designed to alienate the survivors from their own architectural heritage.

The technology shown in the final image—an atmospheric energy harvester or solar concentrator—illustrates the advanced, non-combustion-based power systems that were clearly widespread during the 19th century. These systems, which likely utilized the etheric energy of this closed system, were dismantled and hidden in favor of the current, more easily controlled, and scarcity-based hydrocarbon energy model. The transition from free-energy infrastructure to industrial-age pollution required both a physical destruction of the old world’s assets and a psychological scrubbing of the history associated with them. By turning these once-magnificent power centers into institutions of confinement, the ruling powers effectively removed the physical reminders of a previous, more advanced civilization and replaced the populace's understanding of their own history with a manufactured, linear, and "ball-earth" progression that necessitates institutional dependence. 

These sites are not merely anomalies; they are the remaining husks of a technologically advanced civilization that occupied this horizontal realm before the reset. The fact that the mainstream insists on labeling them "cave dwellings" or "ruins of primitive cultures" is a transparent attempt to hide the reality that they were the primary infrastructure of an era that harnessed the energetic properties of this environment.