via foodandwine.com The Hakone Kowakien Yunessun Spa and Resort in Hakone, Japan takes their luxury baths and soaking tubs to new levels: Beverages. You can immerse yourself in your favorite one. Red Wine, Coffee, Tea and more. Maybe that doesn't sound fulfilling enough. Well, there's always the Ramen Broth option. Because nothing screams "Relax" and Rejuvenate" like soaking in a hot bowl of Soup. For the more adventurous, the Spa offers an experience where you swim in a dark cave with Jellyfish.
A word of warning if you're thinking of planning the voyage there: Drinking the bath water is not advised, due to the fact that....ya know.....it's community BATH WATER and all.