Built from striking natural timbers in 2016, with a pine exterior made from 4000 custom-cut planks and a Scandinavian birch interior, Löyly is entirely powered by water and wind. Its two electric saunas and traditional smoke sauna offer direct access to the Hernesaari waterfront (and winter ice hole). All saunas are mixed and swimsuits are required (swimsuit rental €6).

Surrounding the sauna, 1600 sq metres of decking spans three levels. Its panoramic glassed-in restaurant (mains €19 to €35) serves fantastic organic, sustainable food, from salmon soup to gourmet burgers and sizzling steaks.