I'm at my wit's end. I've checked everywhere possible. Where are the Sanitorium save games normally stored? I can't find them.

If your on win7 or vista have you checked
C:\users\your_username\AppData\Local\ ;Virtual Store\Program Files\gog.com\Sanitarium
The above folder may be hidden. Also if your running 64 bit it will be Program Files(x86)
or C:\users\your username\saved games or \mydocuments?

They should be wherever you installed Sanitarium, even on Vista/7 (32 or 64-bit). For instance, I installed the game to C:\Games, so the path for my saves folder goes like this:
C:\Games\GoG.com\Sanitarium\SAVES
If you just installed the game to the default location, I'd check in Program Files (or Program Files (x86), if you're on 64-bit) for a Sanitarium folder.

I'd already checked the install folder and I couldn't find anything there. Ended up searching through the GOG forums for similar issues and arrived at the Virtual Store folder (AppData\Local\VirtualStore). Sorta forgot about this thread until just now, but yeah. It seems all the save games for my GOG games were being stored there. Thanks for the help anyway. ;)