Remains of Isabella, an iron furnace, part of Catoctin Furnace in Cunningham Falls State Park, Maryland, USA.
<a href="//commons.wikimedia.org/wiki/User:Qbek" title="User:Qbek">Aneta Kaluzna</a>
2007-05-14
<span class="int-own-work" lang="en">Own work</span>