Lonna Sauna, located on the island of Lonna near Helsinki, offers a traditional Finnish sauna experience in a serene setting. The sauna features two loft saunas heated by wood burning stoves, with washing areas downstairs and a large terrace overlooking the archipelago. Open for mixed sauna days, guests can enjoy a peaceful and respectful atmosphere, with separate changing rooms for men and women. Reservations are recommended, and the fee includes soap, shampoo, and seat cover. It's a perfect spot to unwind and relax in the beautiful Finnish nature.