At the bottom you can see a line.  This is the Canadian National railway line.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/54741099@N00">Andrew Bowden</a> from London, United Kingdon
CC BY-SA 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/bods/5999028557/">Mountains at Avalanche Alley</a>