Sötét földalatti szennyvízcsatorna kerek beton alagút. Ipari szennyvíz és szennyvízcsatornába áramló szennyvíz. - Stock fotó és kép

Dark underground sewer round concrete tunnel. Industrial wastewater and urban sewage flowing throw sewer pipe.

Diggers (urban explorers) are exploring underground river flowing in round sewer tunnel.

Light at the end of a long underground tunnel. Smoke and light. A beautiful tunnel in an abandoned bunker. Underground building.

Underground river flowing in round concrete sewer tunnel. Sewage collector.

Tunnel worker examines pipeline in underground tunnel

Sewer tunnel worker in special chemical protective suite in underground sewer tunnel examining sewage collector.

Tunnel worker examines pipeline in underground tunnel.

Tunnel worker examines pipeline in underground tunnel.

Underground vaulted urban sewer tunnel with dirty sewage.

Wastewater from the factory, flowing through the stinky sewer pipe.

Abandoned round underground tunnel of heating duct with rusty tubes

Tunnel worker examines pipeline in underground tunnel.

Old round dirty underground technical tunnel of heating duct with rusty pipeline

Underground vaulted urban sewer tunnel with dirty sewage.

Round concrete underground tunnel of heating duct system with rusty pipes.

Urban explorer with candle in underground communication, heating main, sewer tunnel, etc.