Yeah yeah, anytime! I'll shoot you a message if something comes to mind that evaded it for now.
I'd say overall that the core central and the parks on the coast are pretty nice to just walk in. If you want something exotic, you could try Sompasauna. It's a public sauna free for anyone to heat up in a middle of a construction site. Not sure though if it will is there anymore. It was always kinda of hippy un-permitted thing.
For more pleasant sauna experience, maybe consider visiting Löyly in Hernesaari area. Haven't been there either, but heard it's pretty fancy experience.
http://www.loylyhelsinki.fi/en/front-page/