What the bloody heck is this ruin? (Maybe spoilers?)

[Echo Weaver]

While digging a mineshaft, I found myself hacking through the ceiling of this grisly room. What the heck is this? It looks like a torture chamber, complete with chains hanging from the walls and ceilling.

Are rooms like this all over the place, or is this distinctive? Is there a lore book in here I haven't found?

 

[Shoom]

I found what looked like a mass grave once, just a big pit full of bony soil and skeletons, very creepy. (perhaps victims of the disease, buried deep underground in hopes of containing it) 

The particular one you posted I haven't seen before however. But then again, I keep finding new ones myself, even after hundreds of hours.

[ifoz]

5 hours ago, Echo Weaver said:

Are rooms like this all over the place, or is this distinctive? Is there a lore book in here I haven't found?

All over the place. This one is pretty nice for gathering aged ashlar, iirc it contains 52 full blocks worth. Don't ask how I even still remember that. 

[Echo Weaver]

58 minutes ago, ifoz said:

All over the place. This one is pretty nice for gathering aged ashlar, iirc it contains 52 full blocks worth. Don't ask how I even still remember that. 

Like you've seen this room enough times to have that memorized? 

[Echo Weaver]

I probably shouldn't have put this in questions. It's technically a question but at least half a rant. 

[ifoz]

15 hours ago, Echo Weaver said:

Like you've seen this room enough times to have that memorized? 

I've seen all the ruins in the game (aside from three very rare surface ruins, two of which were added in 1.21). 
This is one of the ruins that really stands out in my memory purely because of the abundance of aged ashlar it is made of, I love using the stuff for builds.

[Butterbot]

I don't think there is any particular lore associated with this ruin. I've also found it. I just assumed that as things were getting grim/messed up as things were collapsing, that some people started engaging in strange practices. Maybe a little ritualism? Maybe a little human sacrifice? Who can say? I chalked it up to it being a time capsule of a weird time and a great source for resources.

[YordaEatsMelon]

Yeah, I've so far thought it's a grave for rot victims, or a place they put them while alive and being consumed by rot so that they couldn't contaminate others as it progressed incurably. The rust spikes is a feature I've seen be generated by the Rust, as it seems to make them appear in areas it's corrupted or affected.