A quick google led to the description you're referencing. I think she's absolutely full of it. I'll bold parts that are either wrong or there is no evidence from anywhere to back it up.
Brittani says: "I grew up in exeter all my life, so I’ve heard all the stories. I’ve gone in most of the buildings, but the only one that currently stands is the hospital. (the round building) I ride through the ground on my atv, and I can honestly say that i never feel alone. Friends parents that used to work there say there are hundreds of unmarked graves around the property. Paitents were raped, gave birth, and the workers killed and disposed of the “evidence” i guess you could say. The dentist is a whole other story. Because these kids were mentally diabled they “couldn’t feel pain”, so the dentist would just pull out teeth, an do all sorts of things with out medications. Its located in the basement of the hospital, and every time i go in that part of the building i swear i feel a sort of pain all over. The showers they were given if you could even call it that was just getting sprayed with a hose, one with enoughpressure to break your skin wide open. Ladd has underground tunnels that led to all the buildings, and one that led to a creamatorim. Like Nazi style they would burn the “useless” paitents. Its not on any map of the grounds, and none of the workers really new where it was. But i found it in the middle of the woods riding on my atv. Its just a big cement block with two chimneys. Ladd school was just a cruel and inhumaine place. You can feel it whenever you step foot on the grounds that something very wrong happened there. "
1)Aerial map discredits cement building with chimneys unless it's what, the building near Job Corps with the big smokestack? That building is still in use and I thought it was a power station. That's the only one that looks like it could fit the crematorium description. Possibly it was a former crematorium, since I've found other descriptions of the buildings at Ladd which include it in the list that haven't been written by 13 year olds who just saw the Craft.
2)If this was the only account of someone being in all the buildings and riding around on an ATV freely through the grounds and bringing all this attention to herself without being hassled by anyone, would you believe it if she said she had been in the tunnels? This is a person who has never seen the morgue there--otherwise there would be a story about it. Obviously if they just burn all the useless patients there's no need for a morgue, LOL
Anyway...
Lots of people think there are tunnels though, so maybe there is something to it, but how come no one has found them yet? I would find it hard to believe that there isn't a single map of Ladd that doesn't show tunnels (if in fact they do exist) because there is definitely a map of the NSH tunnels.
Also, actual crematoriums are apparently kind of rare these days. I would think if there's one that could be capable of functioning, it would still be in use. When my uncle died we had to ship him to another town because it apparently does most of the cremations for eastern CT, which is a little known fact. Also, did you know they have to heat the body to 1800 and crush to a powder what's left after that?
I did find a mention that Belchertown has tunnels that have been bricked or cemented up. This might sound weird, but if you can find a map of Belchertown tunnels or any other place on the net besides NSH, then you might be able to figure out whether there are tunnels at Ladd or not. Find a Belchertown map, no tunnels. No map...then there could still be tunnels at Ladd. Just my 2 cents.