"place them where you want", they said. But if you want a consistent world, not every placement will make equal sense. Find thoughts and inspiration on where (and why) to put the Raven's purge sites.
Beware:
Spoilers ahead
Although your GM might have an entirely different view on the world. You have been warned, though.
Ravenhole
When I read of Ravenhole, I think of Heavy-Metal-College-Parties as depicted in movies from the 80s/90s. (By no means do I think real-world Heavy Metal and violence coincides or correlates)Lots of booze, loud music and stupid ideas. With Ogres.
Best placed in Harmsmoor, F23 for example.