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Underground mine. Underground road for transport. The walls and ceiling of the tunnel are reinforced with anchors and metal mesh.

Construction site tunnel entrance construction, stone construction. equipment for production.

Ruda Slaska, Poland - November 05, 2015: Coal mine. Stairs in a mine tunnel

An old tunnel with an arched metal beams in mauntain

Inside a cicular kiln in Mildenberg (Brandenburg, Germany).

Dark dirty abandoned subway tunnel with rusty railway.

A woman walks towards the light at the end of the tunnel. Copy space. Concept image.

Light at the end of railroad tunnel. Natural lighting.

Cars navigate through an illuminated tunnel in Virginia: Hampton Roads Bridge Tunnels, Virginia - Norfolk route. Car point of view

Underground old sewerage treatment plant tunel of the 19th century

Railway tunnel under construction. Black and white

Rifugio Bunker antiaereo della Seconda Guerra Mondiale di Nera Montoro in Umbria

Vehicle lights in iron ore mine. Special equipment for mines and tunnels.

$Gunma, Japan -August 11, 2024: This is the Usui Pass Tunnel. It is a railway tunnel that passes through Usui Pass (between Yokokawa and Karuizawa) that opened in 1893.The line is now abandoned, and you can walk through it.There are currently 10 tunnels on the old line that you can pass through.\nIt has been designated as an Important Cultural Property of Japan, along with Usui Third Bridge (Megane Bridge), the largest 4-arch bridge in Japan.$

Oil Storage tunnels that were built during WWII following the bombing of above ground storage tanks by the Japanese in 1942. They were never used during the war, and two of the tunnels were used briefly in the 50's for storing jet fuel, but became inoperable after around 3 years due to seepage.

Inside the pipes of a chemical plant under construction

An old abandoned mine located near the Salmon Glacier in northern British Columbia.

Les Écluses du Temple, locks numbers 7 and 8 viewed from passerelle Hôtel du Nord, a footbridge over canal Saint-Martin

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construction site, industrial, concrete, stone structure. equipment for the production.

Coal mine underground corridor with support system

Abandoned tunnels of the Kiev subway between the stations of the University and Khreshchatyk.

Canadian's first railway tunnel transformed into a footpath in Brockville during summer day

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El Paraíso tunnel main gate of Caracas.jpg

Aerial view of the trans Alaska oil pipeline.jpg

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Workers_inside_Ductwork_during_the_Renovation_of_the_White_House,_07/19/1951.jpg

Full view of oil paintings on canvas, interior lobby, U.S. Courthouse, Tallahassee, Florida LCCN2010720299.tif.tiff

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Truman_Balcony_159._Central_Window_to_Sitting_Room.jpg

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Official_Photographer_of_the_White_House_Renovation,_03/03/1950.jpg

Photograph_of_President_Harry_S._Truman_with_Cabinet_and_Family_Leaving_the_Capitol,_01/06/1947.jpg

Borrowing Under a Securitization Structure zh-hant.svg

Swine flu infection exponent by county June 2009.svg

Interior view, African Burial Ground, New York, New York LCCN2010719170.tif.tiff

Going-to-the-Sun Road, park road crew clearing snow from road below West Tunnel.jpg

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South view; interior of main passenger tunnel - North Philadelphia Station.tif.tiff

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