Vaulted concrete underground tunnel of sewer, heating duct or water supply system.

---

Size: 5472px × 3648px
Location: Crimea
Photo credit: © Vladimir Zapletin / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: abandoned, air, aqueduct, circulation, collector, concrete, construction, corridor, danger, dark, deep, dirty, duct, ductwork, engineering, exploring, factory, habitation, heat, heating, homeless, industrial, industry, line, main, metal, mystery, passage, pipe, pipeline, plumbing, power, rusty, sewer, steel, subterranean, supply, system, technical, temperature, tube, tunnel, underground, urban, valve, vaulted, ventilation, warm, water