A Winter Raikuu-canal

Raikuu-canal environment has for centuries been of strategic importance to the kingdom and the history of the war . Raikuu was an old Swedish -Russian border and the place Lake Paasivesi to Lake Puruvesi between . Current natural stones lined open canal is one of Turku's peace after a new fault line built in the vicinity of .

Raikuu-canal is located in Kerimäki to Lake Puruvesi and Lake Orivesi between the waters of Lake Saimaa . Between the two lakes waterway consists of two pond and its excavated from Raikuu , pistal and Grass Taipale canals
The canal environment is the first and the second world war to defense equipment , which together form a canal with an impressive landscape of the environment .

After the Second World War, the Gulf of Finland to Lapland extends fortress chain Salpa (see separate item Salpa theme ) is based on the South Savo waterways. Kerimäki Raikuu-canal is the main fortified area . The canal is on the shores addition . armor forreinforced concrete protection against ​​stone wall barriers to 1,5 km.
  
history
The oldest traces of Raikuu in the history of the Stone Age . Raikuu was still low at the beginning of a new age sound . The uplift and the surface of the water due to the fall strait , however, gradually grew up.

Henrik Porthan subscribe for knowledge, the community dug Raikuu , pistal and Grass Taipale-canal without the crown of funding the mid-1700s . Turku School of Peace in 1743 passed the limit Kerimäki the controller in the middle , Raikuu of the canal is the Swedish -Russian border region.

Canal digging shortened the distance Orivesi Lake Saimaa, about seven miles. The canall was gutted 1858-1859 with the support of the government . Marine traffic canal was too shallow, the canal was, however, an important floating and small boat route . The canal was built for King Gustav III's war in 1788-90 during the fortifications . Fortification continued by the Russians during World War I , when it was part of the St Petersburg line of defense.

The canal region Salpa Line fortifications are primarily related to the Winter War and Continuation War from 1940-41 Finland's eastern border built to protect the Salpa Line .
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Sorry if the text is garbled, I'm not very good at writing in the English language.