Kvarken Archipelago World Heritage Site

Kvarken is the narrow region in the Gulf of Bothnia separating the Bothnian Bay from the Bothnian Sea. The distance from Swedish mainland to Finnish mainland is around 80 km while the distance between the outmost islands is only 25 km . The water depth in the Kvarken region is only around 25 metres . The region also has an unusual rate of land rising at about 10 mm a year. On the Finnish side of Kvarken, there is a large archipelago, the Kvarken Archipelago, which includes the large islands Replot, Björkö and a large number of smaller islands. Most of it is belongs to the municipality of Korsholm. Most of the small islands are inhabited. The archipelago is smaller on the Swedish side of the region, and the islands have much steeper shores. The Kvarken region was historically important also, because mail was delivered across Kvarken when the sea was completely frozen from the Swedish to the Finnish coast. This mail route was used frequently during the period of Swedish rule. In the group of islands in the “middle” of the Kvarken region, in Swedish called Valsörarna – Finnish Valassaaret, is a 36-metre-high lighthouse designed by Henry Lepaute who worked for Gustave Eiffel's engineering bureau. The structural similarity between the lighthouse and the Eiffel tower is quite obvious. The lighthouse is now automated as are most lighthouses in Finland. Several attempts to cross the strait swimming have been made but cold water and currents have usually been insurmountable obstacle. The first successful atttempt was carried out by Lennart Flygare, Pavio Grzelewski och Tore Klingberg who on the 24:th of July 2018 swam from Vallasaaret on the finnish side to Holmögadd in Sweden. It took them 12 hours 2 minutes to cross the strait .
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