construction workers on a large tunnel construction site
A look inside a disused underground mine which is now being used as a hideout.
Tourists led by a guide in an underground tunnel
Two women scientists in bio-hazard suits testing
Group of scientists examining a crystal in a cave
Loading of iron ore in the mine
Speleologists or geologists checking a cave
Group of cavers hiking through cave
Walking in a dark tunnel hollowed out in a rock, 4k
In a first-person walking view, explore an underground abandoned tunnel with spooky spiderwebs, cobwebs, and dusty wooden planks
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Exploring a dim bunker with rocky walls and exposed pipes
Walking POV shot inside a large dark construction tunnel
Heavy mining vehicle with big dipper drives into large dark mine to get fresh ore. Professional machinery illuminates area with bright headlights
The miner is controlling a cargo transport in the mine
Top view of quarry with excavators. Shot. Excavators work in quarry for extraction of minerals like ants workers. Mining industry concept
Man explores cave with light in narrow cave
silhouette of many construction workers walking out from a large tunnel
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Exploring the dimly lit corridors of an underground bunker with exposed pipes
Drilling of iron ore in a mine
Underground drilling machine in the mine
Construction workers walking into a large tunnel
Machinery equipment drills holes for setting explosives in ore mine. Professional robot drill with coolant operates to mine minerals closeup
Train tracks in a labyrinth corridor in a real underground wet mine
Plastic pipes laid in trenches
Scientist pointing to mineral deposits in a cave
Old coal mine elevator and slag heaps on a cloudy day. Vintage coal mining shaft building, weathered factory and constructions. Fossil fuel and minerals mining heavy industry landscape with terrikons.
Rising from the base of an industrial-sized mine shaft to the top of the shaft at ground level.
Pipeline construction. Tractor pipelayer lays a gas pipeline. Construction of a new gas pipeline.
Construction workers walking into a large tunnel
Underground drilling machine in the mine
Aerial view, Construction of gas pipeline through agricultural field
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Discovering an Ancient Sculpture Within a Mysterious Cave Illuminated by Dramatic Lighting
Ancient Cave With Statue
The western wall tunnels in old city Jerusalem
Plastic pipes laid in trenches into dirty water. Close up above view
Professional equipment drills holes in rocks of ore mine spraying water. Robot machinery with coolant operates to extract natural resources closeup
Person in bio-hazard suit, face mask and goggles wearing a headlamp standing taking notes in an underground tunnel as members of the team move around in the background.
silhouette of many construction workers walking out from a large tunnel
Moving down the tunnel of an underground mine with a railroad track running through the center.
Israel, July10, 2018 - Construction workers walking into a large tunnel
In the pipeline repairs. Construction of the blue pipeline. Gas pipe. Construction of the pipeline. Pipeline building. Construction
Portland City 135 Pearl Construction Site Day to Night Time Lapse
silhouette of many construction workers walking out from a large tunnel
Plastic pipes laid in trenches. Move camera
abandoned gold mine trolley used to cart ore during the gold rush
Colorful Mine Lode on Soil Surface in Mountains
silhouette of many construction workers walking out from a large tunnel
Two adventurers trapped in a tight spot inside a cave