Allas Sea Pool, Helsinki, Finland. Now open to the public. "Allas Sea Pool, located a stone’s throw away from the Helsinki marketplace, proudly stands in one of the best locations in the city. This wooden sea pool boasts several saunas, swimming pools and restaurant.... It is a one-of-a-kind oasis in the middle of the city, the likes of which cannot be found anywhere else in the world.... In addition to wellness, a cleaner future is one of Allas Sea Pool’s central themes."