Remnants of the Shawsheen River Aqueduct, Middlesex Canal, Wilmington, Massachusetts. Photograph taken by Daderot, September 2005.
Daderot
CC BY-SA 4.0
<a class="external free" href="https://en.wikipedia.org/wiki/File:Shawsheen_River_Aqueduct,_Middlesex_Canal,_Massachusetts.JPG">http://en.wikipedia.org/wiki/File:Shawsheen_River_Aqueduct,_Middlesex_Canal,_Massachusetts.JPG</a>