they are research facilities to study human decomposition for scientific and forensic purposes. if you donate your body to science you may end up on one.
Well shit, today I learned! ...that's still vaguely terrifying!
You've never heard of these places? They're fun! Not much for the kids to do, though
Sounds like the kind of place you set up to provide enrichment for developing Frankensteins. Like a safe place for them to gather body parts before they move onto proper grave robbing.
Well, we need to grow bodies somewhere, and it's not like storks actually do anything useful...