A portion of the "bathtub" slurry wall from the World Trade Center seen from below in the National September 11 Museum at 180 Greenwich Street in the Financial District of Manhattan, New York City.
<a href="//commons.wikimedia.org/wiki/User:Beyond_My_Ken" title="User:Beyond My Ken">Beyond My Ken</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>