sewer, manhole, tunnel, pit, hole

abandoned arc arch asphalt background bottomless brick bright canal cement cesspit cesspool channel city concrete cover danger dark dead deadend deep dirty drain drainage drops dry empty end endless exit fall filth filthy garbage glow gray grey grunge grungy heaven hole illustration industrial inside isolated light manhole metal metro old open pavement pipe pipeline pipework pit precast rain road round septic sewage sewer sewerage shine stone street strong subway tank tube tunnel underground urban vector wall water well wet