Crevice Industrial Pipe Endpoint Cave System

A jagged limestone cavern embedded in the Scope's lower infrastructure, its mouth framed by corroded metal struts and slick with condensing moisture. The air carries the sharp scent of ozone and wet stone, marked by the Doctor's decisive push of Jo into its depths. The passage narrows abruptly into a vertical industrial conduit requiring controlled descent via a corroded wooden ladder system whose rungs groan underfoot. The cavern's inner walls reflect the dim glow of Jo's failing light source, revealing patches of pale blue-green mineral veins—possible traces of the unidentified substance threatening the mining community. The ladder enables traversal through the pipe system, transforming an impassable obstacle into a deliberate route of descent central to the duo's survival.