... Great postcard of country nr5 showing the Struve Geodetic Arc ... this one is in Aavasaksa, the southernmost point of Finland where you can see the midnight sun... the crosses carved in the rock to mark the point are now located beneath the Viewing Tower erected in 1969... still 5 more to find... (◕‿-) Thanks Virpi!! (ヅ)
The arc which stretches from the Black Sea to the Arctic Ocean, was measured from 1816 - 1855 and has been used to determine the the size and shape of the Earth.
The countries are Norway, Sweden, Finland, Russia, Estonia, Latvia, Lithuania, Belarus, Moldova and Ukraine.
A total of 34 station points have been selected for protection, six of these being located in Finland.
The Aavasaksa (Avasaksa) point was measured in 1845 on the highest point of the Hill.
The Struve Geodetic Arc is listed on the UNESCO World Heritage Sites in 2005.