Inside
(Okay, Marivhon reverse-leads the way. Kind of like how if you were doing the Iditarod, with the leader, the guy who's motivating things, 'following' in the back.)
You enter the foundry. I'll assume you're using Cinder's light coin. The foundry is huge, and completely ruined. Once huge machines, boilers, and forges must have toiled here, but the equipment is burned and crushed by rubble. Parts of it look like it has sufferred an explosion. Other sections look purposefully cut.
Towards the back is a large trapdoor. It's a metal storm door; a pair of doors, each about 9'x4'. You open the storm doors to uncover a staircase down. Down you go.
The cellar is another large workroom; however, this one looks more intact. Two of the massive chimneys open up down here. Before a large anvil is a giant of a man, wielding an enormous hammer. You prepare for battle before realizing that he, or it, is motionless. Just an iron statue of a blacksmith. The statue is fully articulated though and wears a large leather smock, and is covered with soot. There is a panel in his chest in the back, partially ajar.
At the very back are a pair of alcoves. In each is a statue of a woman in a toga; an identical statue in each corner, with one exception. The one on the left extends her right hand and holds a key made of copper on a leather strap. The one on the right extends her left hand and holds a key made of crystal on a silver chain.
That apparently describes what remains of this building.