Constructed from Finnish fir, this 2016-built swimming complex sits right on the harbour against a spectacular city backdrop. It incorporates a bracing Baltic seawater pool, two freshwater pools – one for adults, one for kids; both heated to 27°C (80.6°F) – and three saunas (male, female and mixed). Regular events include DJs or full-moon all-night nude swimming. Its restaurant serves Nordic cuisine.

Views are superb from its roof terrace. On the ground floor there's a casual cafe.