The ferry from Stockholm (Sweden) to Turku (Finland) passes through no less than 3 archipelagos, each of which consist of thousands of islands and skerries. When taking a night ferry eastbound, one first sails through the Stockholm Archipelago for hours until the sun sets. In the middle of the night the Åland Archipelago is reached (Swedish-speaking, but Finnish territory), and by early morning one enters the Turku Archipelago.
Below are some pictures from our journey through the Stockholm Archipelago in July 2016. Weather was excellent and I hence stayed on the upper deck enjoying the spectacle until the sun disappeared below the horizon.