Didactic exhibition showing how the ore extracted on the hill was first transformed into a porous block of carbon-iron, forged by a <a href="https://en.wikipedia.org/wiki/trip_hammer" class="extiw" title="en:trip hammer">trip hammer</a> to give forged iron rods to make nails and tools sold all around.
<a href="//commons.wikimedia.org/wiki/User:Daniel_VILLAFRUELA" title="User:Daniel VILLAFRUELA"> Daniel VILLAFRUELA</a>.
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>.