Helsinki is located in the western part of Taivassalo, close to the insular municipality of Kustavi.

Helsinki was the road's entry and exit point for the entire Finnish mainland.

[5] In the 26th of September, 1808, during the Finnish War, 3,400 soldiers led by Gustaf Olof Lagerbring landed in Helsinki.

Two days after the landing, they were defeated in Viiainen by Russian soldiers led by Pyotr Bagration.

[7] Parts of the old mail route have been preserved in the area, including the dock on the Tylpänniemi.