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Expedition Bjurälven: On the Jämtland mountains, a group of spelunkers and cave divers are exploring what proved to be

Expedition Bjurälven: On the Jämtland mountains, a group of spelunkers and cave divers are exploring what proved to be Sweden’s longest underwater cave.

Source: expeditionbjuralven.se

cave bjurälven divers expedition expeditionbjuralven spelunkers jämtland longest