Tags: Lighthouse, Tower.
Tjärven is the name of a small island and light station surrounded by deep water and located in the sea of Åland north of the Söderarm archipelago of the coast of Sweden. The lighthouse functions as the entrance to the shipping route for the ports of Kapellskär Norrtälje and Stockholm. A day beacon existed on the island since the 19th century. The lighthouse construction began in 1902 and was finished in 1903.
