Fortress Hameenlinna and Lake Vanavesi

By the way, in 1808, the Swedes, immediately before the surrender of the fortress, drowned in the lake a large amount of all kinds of weapons and equipment, such as 9 cannons (riveted) and several thousand fuses, as well as a lot of gunpowder, bullets, cannonballs, etc. There are no reports in Russian sources about the rise of all that stuff. Attempts to find anything in the 1980s also failed due to a thick layer of silt at the bottom of the lake and a lack of funds.