I feel like it would fit with the barbarian aesthetic to have a hot bath structure we could build, with varying tech levels, from a simple wooden tub to something more extravagant. A hot steamy bath when you get home from adventuring, to rejuvenate and heal.
On top of that, make room for an Attendant thrall to operate the bathing station, and speed up that rejuvenation process. Just a little touch of utility and thematic expansion. Not suggesting anything too risque. Just a soak without a thrall, and bit of sponging off with a thrall. I dunno, something that popped into my head and kinda seemed right in the context of building a castle with a throne room.