They have huge cinnamon buns here, a nice thing to split with your friends. A really finnish treat. Owed by café esplanad (where you get the same sort of bakeries), but I prefer Success for it's smaller space.
Architect Tuomas Toivonen´s and Nene Tsuboi´s ecological design -sauna in the shadow of sculptural Merihaka district. Wood pellet heated saunas for men and women. Seat covers included in admission, towels can be rented. Open all year round, ice swimming in winter. NB! No own drinks allowed, no reservations, limited entry for groups (max. 3persons).
If you need a dose of nature while in Helsinki, a great option is to go for a walk or jogging in Keskuspuisto, Central Park. It's easy to reach by tram or bus. I recommend going beyond Ruskeasuo if you yearn for more forested landscapes. The photo is taken in December near Ruskeasuo.
Töölönlahti Bay is a really nice area in the middle of Helsinki. It's a lovely walk around the bay and especially in the summer you can sit down and have break at the café located up on the hill and enjoy the view.