a moaning song

She sings , a creaking and moaning song
It resounds clearly in sunless tunnels
A slow but soothing, a lasting groan
Which peaks around the sharpest turns

This prodigious serpent of steel
Glistening in the morning light
This wondrous creature of man , moves
From impossible depths to towering heights

Through green fields , over vast bridges
Mist ridden hills and hazy cities
Over that red-orange horizon she skips
Down that winding path , she wanes