Tunnels are three-dimensional but
 their size is always restricted,
 mostly because they have to be cut
 through the ground as clearly depicted.
Sometimes a tunnel is drilled under water
 like the Channel Tunnel for trains.
 In modern times it’s no workers‘ slaughter,
 but takes big machines and big brains.
This way man does indeed subjugate
 the earth, even drilling through rock.
 He tunnels the Alps, so we don’t have to wait
 to pass through and can go round the clock.
There remains, however, a shred of fear
 if all our plans can succeed.
 Remodelling all resources here
 we might become victims of greed.
 
 