Before you chuckle at the idea of a sauna in H&H let me explain it thoroughly;
I was thinking you know in some games that are similar to Haven & Hearth, they sometimes let you visit a hot springs or sauna to regain your stamina. And I thought you know what a sauna could actually fit into this game considering we've already have things like tables, chairs, cupboards and beds. It's something that has an actual utility function in this game = not a decoration. Make it take a lot of materials to build, but raise stamina(and or energy) faster than sitting in a chair, just by going in it. Hot Springs could be a random resource type thing that spawns in the world, that works the same as a sauna but perhaps is even better. The pit clay resource model in the world, with some slight reworking could be very reminiscent of a hot springs with its bubbling and all.