Red object at the site of an underground mine (Otani Museum)
Underground space of the former Oya stone quarry (Oya Museum)
The strange sight of the underground mine site at Otani Museum
The strange sight of the former underground Oya stone mine (Oya Museum)
Wall pattern of the Oya stone mechanical moat (Oya Museum)
Inside the illuminated Otani material
Sado Kinzan Doyu no Wari Door
Sado Kinzan
Sado Kinzan Tunnel Entrance
Inside the Oya Museum
Oya stone underground mine site
Oya stone underground mine site
Oya stone underground mine site
Oya stone underground mine site
Oya stone underground mine site
Oya stone underground mine site
Oya stone underground mine site
Oya stone underground mine site
Oya stone underground mine site
Oya stone underground mine site
Oya stone underground mine site
Oya stone underground mine site
Oya stone underground mine site
Oya stone underground mine site
Oya stone underground mine site
Oya stone underground mine site
Oya stone underground mine site
Oya stone underground mine site
Oya stone underground mine site
Warito of Doyu at Sado Gold Mine
Oya stone underground mine site
Oya stone underground mine site
Oya stone underground mine site
Oya stone underground mine site
Oya stone underground mine site
Oya stone underground mine site
Oya stone underground mine site
Oya stone underground mine site
Sado Kinzan Tunnel Entrance
tunnel
Sado Minecart
Sado Kinzan
Oya stone underground mine site
Oya stone underground mine site
Oya stone underground mine site
Stone storage area at Oya Museum
Inside the Oya Museum (gopro)
Oya stone quarry trace
Oya stone quarry site
Oya stone quarry trace
Oya stone quarry trace
Oya stone quarry site
Oya stone quarry site
Oya stone quarry site
Oya stone quarry trace
Oya stone quarry site
Oya stone quarry site
Oya stone quarry site
Oya stone quarry trace
Oya stone quarry trace
Oya stone quarry site
Oya stone quarry trace
Oya stone quarry trace
Oya stone quarry trace
Oya stone quarry trace
Oya stone quarry trace
Oya stone quarry trace
Oya stone quarry trace
Oya stone quarry site
Oya stone quarry site
Oya stone quarry trace
Oya stone quarry site
Oya stone quarry trace
Oya stone quarry site
Otani Museum Underground Quarry
Oya Museum After mining Oya stone
Walk in the mine
Tochigi Prefectural Otani Museum
Otani Museum Huge Underground Space
Otani Museum Underground Space
Otani Museum Underground Exhibition
Miike Coal Mine Mikawa Pit "Remains of the First Winding Machine Room"
Miike Coal Mine Mikawa Pit "Second Winding Machine Room Site"
Miike Coal Mine Mikawa Pit "Second Incline Shaft Remains"
Miike Coal Mine Mikawa Pit "Remains of the First Winding Machine Room"
Otani Museum (Tochigi Prefecture)
Miike Coal Mine Mikawa Pit "Second Incline Shaft Remains"
Tunnel ramp
boring survey
Oya stone quarry site
Oya stone quarry site
Oya stone quarry site
Oya stone quarry site
Oya stone quarry trace
Oya stone quarry site
Oya stone quarry site
Oya stone quarry site
Oya stone quarry site
Oya stone quarry site
Oya stone quarry site
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