concrete​ wall with​ moss and​ sewage water​ pipe.

building wind tower windmill machine mast field mill farm transport barn electricity prairie shack industry concrete wall moss sewage water pipe outdoor flow ducts circular drainpipe structure tube ground reinforced pipes drilling holes ecology conduit canal hole pipeline dirty environment waste sewer round industrial pollution drainage cement stone construction aqueduct drain culvert plumbing manufacturing irrigation tunnel sewerage river background underground urban flowing work architecture dark