editor
hiraethified
Huge tunnels are being built under New York for the extension of the Long Island Rail Road and they look amazing:
More: http://gizmodo.com/5985618/incredible-images-of-the-new-massive-tunnels-hollowing-new-york-city
More: http://gizmodo.com/5985618/incredible-images-of-the-new-massive-tunnels-hollowing-new-york-city