Carillon
From The Fifth City Wiki
"This peaceful, carmine institution was founded by devils from London and dedicated to the betterment of the soul. Botheridge's 'A Tour of Heaven' describes it as 'a cross between a spa, a sanatorium and purgatory.' She commends its bracing airs."

Located in the Reach, Carillon is a hub of devils, an institution for the refinement of souls. It is, to use a real-world analogy, the Hotel California of the Neath: one can stay and have a great time, but can never leave. Or at least, one might have difficulties leaving.