I haven't ever been in one -- but I have heard enough. [She spreads her hands open in an arch, descriptive:] A pool of waters so warm you feel it'll start boiling, meant to relax you for the rest of the day. A must have at least once in one's life.

[Yeah, she's not from a place where hot springs are common in the slightest. She hasn't ever been not even in the vicinity of one!]