This King's Road (Finnish: Kuninkaantie, Swedish: Kungsvägen) is an old mailing route dating back to the 14th century starting from Bergen in Norway on the Atlantic coast, passing through the capitals of Norway and Sweden (Oslo and Stockholm) crossing the sea through the archipelago (passing another capital; Mariehamn) to Turku in Finland and ending up in Vyborg in Russia.
The modern tourist route "King's Road" is extended to St. Petersburg.