My train trip through Europe also involved one boat ride, from Turku to Stockholm. A day boat... arriving just in time in Stockholm for the night train. But, more importantly, the boat had three nice things going for it: (1) a cabin included in the ridiculously low 30€ price, nice for conference calls and naps, (2) decent restaurants to eat at, and (3) a spa with several saunas and pools, all with views of the archipelago as we were sailing towards Marienhamn.
The boat I was on was Viking Line's Viking Glory, a brand new 2022 ship with energy efficient engines and spectacular insides. Not bad!
The spa visit cost only 24€ for two hours, and was well worth it. There was a hot Finnish sauna on both men's and women's side, a shared sauna with large windows, and a shared steam room. There were two large jacuzzis and one large pool with bed-like resting platforms, all right next to windows to at the front of the ship.
For more sauna and swimming stories, check out planetswimmer.com and saunablogger.cool websites! And of course the Planetcaver, and Planetskier blogs for other stories in Blogspot and TGR! The photos and text (c) 2022 by Jari Arkko. All rights reserved. I never take photos of other saunagoers or swimmers and visit when there is simply no one else or the facility has been closed or booked only for me.