Mosaic K1 potash mine near Esterhazy, Saskatchewan, Canada.
Underground, one kilometre beneath the surface. During approximately 45 years of mining activity, around 4700 km of tunnels have been bored. Specially adapted off-road vehicles are used to move around in the tunnels.

photo: Martin Mraz (image by Martin Mraz)
Mosaic K1 potash mine near Esterhazy, Saskatchewan, Canada. Underground, one kilometre beneath the surface. During approximately 45 years of mining activity, around 4700 km of tunnels have been bored. Specially adapted off-road vehicles are used to move around in the tunnels. photo: Martin Mraz
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